Giỏ hàng (0)

HOTLINE

0915.111.227

  1. Trang chủ
  2. Sản phẩm
  3. Camera giám sát
  4. Camera Vantech
  5. Camera VANTECH VP-204A

Hổ trợ trực tuyến

Phụ trách kinh doanh - 0909.229.453

Phụ trách kinh doanh - 0909.229.453

Chat Zalo - 0915.111.227

Chat Zalo - 0915.111.227

Mail báo giá - vitinhthanhhai24@gmail.com

Mail báo giá - vitinhthanhhai24@gmail.com

Bộ Camera trọn gói

Camera giám sát

Đầu ghi hình Camera

Báo cháy - Báo trộm

Chuông cửa màn hình

Bộ đàm

Dòng sản phẩm Hot

Camera giám sát Vantech VP-4577SM
- LH : 0915.111.227 - Độ phân giải 3.0MP - Chuẩn nén H.265+ - Ống kính cố định 3.6mm - Tích hợp 2 đèn LEDs trợ sáng hỗ trợ 3 chế độ: * Full color khi phát hiện chuyển động của con người * Full Color / STARLIGHT - Cung cấp hình ảnh đầy màu sắc 24/7 với ống kính siêu khẩu độ F1.0 và cảm biến hiệu suất cao - Tích hợp microphone lọc nhiễu - Hỗ trợ PoE / ONVIF
 MUA NGAY

Camera giám sát Vantech VP-4577SM

2,990,000 đ

Camera giám sát Vantech VP-4577SM
- Độ phân giải 3.0MP - Chuẩn nén H.265+ - Ống kính cố định 3.6mm - Tích hợp 2 đèn LEDs trợ sáng hỗ trợ 3 chế độ: * Full color khi phát hiện chuyển động của con người * Full Color / STARLIGHT - Cung cấp hình ảnh đầy màu sắc 24/7 với ống kính siêu khẩu độ F1.0 và cảm biến hiệu suất cao - Tích hợp microphone lọc nhiễu - Hỗ trợ PoE / ONVIF

Camera giám sát Vantech VP-4577SM

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-61592FP
- 6.0 Megapixel Resolution - H.265+/H.265/H.264+/H.264 Video Compression - 1.27 mm Focal Length - Support BLC, HLC, defog, 3D DNR - Up to 15 m IR range ensures safety at night - Built-in micro SD/SDHC/SDXC card slot Smart features: - 360° zero-blind zone image: a fisheye network camera capable of providing a 360 degree panoramic image of its surveillance scene - Heatmap: based on deep learning algorithms, the camera counts people and presents an intuitive map

Camera giám sát Vantech VP-61592FP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-51590
- 3.0 Megapixel Resolution (VP-31590) - 5.0 Megapixel Resolution (VP-51590) - H.265+/H.265/H.264+/H.264 Video Compression - 1.27 mm Focal Length - Support BLC, HLC, defog, 3D DNR - 360° zero-blind zone image: a fisheye network camera capable of providing a 360 degree panoramic image of its surveillance scene - Up to 15 m IR range ensures safety at night - Built-in micro SD/SDHC/SDXC card slot

Camera giám sát Vantech VP-51590

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-31590FP
- 3.0 Megapixel Resolution (VP-31590) - 5.0 Megapixel Resolution (VP-51590) - H.265+/H.265/H.264+/H.264 Video Compression - 1.27 mm Focal Length - Support BLC, HLC, defog, 3D DNR - 360° zero-blind zone image: a fisheye network camera capable of providing a 360 degree panoramic image of its surveillance scene - Up to 15 m IR range ensures safety at night - Built-in micro SD/SDHC/SDXC card slot

Camera giám sát Vantech VP-31590FP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-5237AI
- 2.0 Megapixel Resolution - H.265/H.264 Video Compression - 6.0 ~ 222mm (37X Optical Zoom) - Clear imaging against strong back lighting due to 130 dB WDR technology - Pan and tilt ability enables camera to monitor zones of interest - Support BLC/3D DNR/ROI/HLC - Laser Night Vision distance over 800M in total darkness - Intelligent analytics: Face Detection, Intrusion Detection, Line Crossing Detection, Region Entrance Detection, Region Exiting Detection...

Camera giám sát Vantech VP-5237AI

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-2TD4916F/V2
- 2.0 Megapixel Resolution - 6.7~330mm (49X Optical Zoom), 16X Digital Zoom - High sensitivity thermal module: 640 x 512 resolution - NETD is less than 40 mk (@25° C, F#=1.0) - Supports contrast adjustment - Leading thermal image processing technology: Adaptive AGC, DDE, 3D DNR - Up to 15 palettes of adjustable color - Smart tracking: Panorama, event & multi-scene patrol - Based on AI algorithm: Line crossing, intrusion entrance & exit - Advanced Fire Detection

Camera giám sát Vantech VP-2TD4916F/V2

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-3240PTS
- 2 x 4.0 Megapixel Resolution - 2.8mm Focal Length - Horizontal field of view: 2 x 180° Vertical field of view: 85° - Supports people density detection in panoramic channel Tracking PTZ Camera: - 4.0 Megapixel Resolution - 6.0 ~ 240mm (40X Optical Zoom), 16X Digital Zoom - Clear imaging against strong back lighting due to 140 dB WDR technology - Pan and tilt ability enables camera to monitor zones of interest - Up to 250m IR range ensures safety at night - 36 VDC, Max.150 W - IP66

Camera giám sát Vantech VP-3240PTS

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-2R0842HP
- 2.0 Megapixel Resolution - H.265+/H.265/H.264+/H.264 Video Compression - 6.0 ~ 252mm (42X Optical Zoom), 16X Digital Zoom - Clear imaging against strong back lighting due to 140 dB WDR technology - Pan and tilt ability enables camera to monitor zones of interest - Support BLC/3D DNR/ROI/HLC - Built-in Smart IR. Up to 400m IR distance - 12 VDC & Hi-POE (Max.60W) - IP66 / Ik10 Standard

Camera giám sát Vantech VP-2R0842HP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-2R0732HP
- 2.0 Megapixel Resolution - H.265+/H.265/H.264+/H.264 Video Compression - 4.8 ~ 153mm (32X Optical Zoom) - Clear imaging against strong back lighting due to 130 dB WDR technology - Pan and tilt ability enables camera to monitor zones of interest - Support BLC/3D DNR/ROI/HLC - Up to 150m IR range ensures safety at night - 24 VAC & Hi-POE (Max.60W) - IP66 Water and dust resistant

Camera giám sát Vantech VP-2R0732HP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-2R0425P
- 2.0 Megapixel Resolution - H.265+/H.265/H.264+/H.264 Video Compression - 4.8 ~ 120mm (25X Optical Zoom) - Clear imaging against strong back lighting due to 130 dB WDR technology - Pan and tilt ability enables camera to monitor zones of interest - Support BLC/3D DNR/ROI/HLC - Up to 100m IR range ensures safety at night - 12 VDC & POE - IP66 Water and dust resistant

Camera giám sát Vantech VP-2R0425P

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-51533IP
- 2.0 Megapixel Resolution (VP-21533IP) - 5.0 Megapixel Resolution (VP-51533IP) - H.265+/H.265/H.264+/H.264 Video Compression - 4.5 ~ 148mm (33X Optical Zoom) - Clear imaging against strong back lighting due to 130 dB WDR technology - Support BLC/3D DNR/ROI/HLC - Built-in Smart IR. Up to 400m IR distance - 12 VDC & POE - IP66 Water and dust resistant

Camera giám sát Vantech VP-51533IP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-21533IP
- 2.0 Megapixel Resolution (VP-21533IP) - 5.0 Megapixel Resolution (VP-51533IP) - H.265+/H.265/H.264+/H.264 Video Compression - 4.5 ~ 148mm (33X Optical Zoom) - Clear imaging against strong back lighting due to 130 dB WDR technology - Support BLC/3D DNR/ROI/HLC - Built-in Smart IR. Up to 400m IR distance - 12 VDC & POE - IP66 Water and dust resistant

Camera giám sát Vantech VP-21533IP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-5350DP
- 2.0 Megapixel Resolution (VP-2350DP) - 5.0 Megapixel Resolution (VP-5350DP) - H.265/H.264+/H.264 Video Compression - 2.8 ~ 12mm (4X Optical Zoom) - Clear imaging against strong back lighting due to 130 dB WDR technology - Support BLC/3D DNR/ROI/HLC - Up to 20 ~ 30m IR range ensures safety at night - 12 VDC & POE - IP66 Water and dust resistant

Camera giám sát Vantech VP-5350DP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-2350DP
- 2.0 Megapixel Resolution (VP-2350DP) - 5.0 Megapixel Resolution (VP-5350DP) - H.265/H.264+/H.264 Video Compression - 2.8 ~ 12mm (4X Optical Zoom) - Clear imaging against strong back lighting due to 130 dB WDR technology - Support BLC/3D DNR/ROI/HLC - Up to 20 ~ 30m IR range ensures safety at night - 12 VDC & POE - IP66 Water and dust resistant

Camera giám sát Vantech VP-2350DP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-2896LPR
- 2.0 Megapixel Resolution - H.265, H.264, MJPEG Video Compression - 2.8 ~ 12mm Varifocal lens - 2 built-in high-performance IR and white light switchable LEDs to satisfy requirements of different scenarios. - Supports multi-frame LPR - Supports dirty license plate recognition - Supports quick pass of multiple vehicles - Supports vehicle color recognition

Camera giám sát Vantech VP-2896LPR

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-i4896VBP-A
- 4.0 Megapixel Resolution - H.265+/H.265/H.264+/H.264 Video Compression - 2.8 ~ 12mm Varifocal lens - Clear imaging against strong back lighting due to 140 dB WDR technology - Support BLC/3D DNR/ROI/HLC - Up to 80 ~ 100m IR range ensures safety at night - Built-in micro SD/SDHC/SDXC card slot - 12 VDC & POE - IP67 Water and dust resistant, IK10 Vandal proof Intelligent (Deep Learning Algorithm): - Hard Hat Detection - Queue Management - Premier Protection

Camera giám sát Vantech VP-i4896VBP-A

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-i2696BP-A
- 2.0 Megapixel Resolution - H.265+/H.265/H.264+/H.264 Video Compression - 4/6/8mm Varifocal lens - Clear imaging against strong back lighting due to 140 dB WDR technology - Support BLC/3D DNR/ROI/HLC - Up to 60 ~ 80m IR range ensures safety at night - Built-in micro SD/SDHC/SDXC card slot - 12 VDC & POE - False alarm reduction through human and vehicle target classification based on deep learning

Camera giám sát Vantech VP-i2696BP-A

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-8691VBP
- 6.0 Megapixel Resolution (VP-6691VBP) - 8.0 Megapixel Resolution (VP-8691VBP) - H.265+/H.265/H.264+/H.264 Video Compression - 2.7 ~ 13.5mm Varifocal lens - Clear imaging against strong back lighting due to 130 dB WDR technology - Support BLC/3D DNR/ROI/HLC - Up to 60 ~ 80m IR range ensures safety at night - Built-in micro SD/SDHC/SDXC card slot - 12 VDC & POE - IP67 Water and dust resistant, IK10 and vandal proof

Camera giám sát Vantech VP-8691VBP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-6691VBP
- 6.0 Megapixel Resolution (VP-6691VBP) - 8.0 Megapixel Resolution (VP-8691VBP) - H.265+/H.265/H.264+/H.264 Video Compression - 2.7 ~ 13.5mm Varifocal lens - Clear imaging against strong back lighting due to 130 dB WDR technology - Support BLC/3D DNR/ROI/HLC - Up to 60 ~ 80m IR range ensures safety at night - Built-in micro SD/SDHC/SDXC card slot - 12 VDC & POE - IP67 Water and dust resistant, IK10 and vandal proof

Camera giám sát Vantech VP-6691VBP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-4691VBP
- 2.0 Megapixel Resolution (VP-2691VBP) - 4.0 Megapixel Resolution (VP-4691VBP) - H.265+/H.265/H.264+/H.264 Video Compression - 2.7 ~ 13.5mm Varifocal lens - Clear imaging against strong back lighting due to 130 dB WDR technology - Support BLC/3D DNR/ROI/HLC - Up to 60 ~ 80m IR range ensures safety at night - Built-in micro SD/SDHC/SDXC card slot - 12 VDC & POE - IP67 Water and dust resistant, IK10 and vandal proof

Camera giám sát Vantech VP-4691VBP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-2691VBP
- 2.0 Megapixel Resolution (VP-2691VBP) - 4.0 Megapixel Resolution (VP-4691VBP) - H.265+/H.265/H.264+/H.264 Video Compression - 2.7 ~ 13.5mm Varifocal lens - Clear imaging against strong back lighting due to 130 dB WDR technology - Support BLC/3D DNR/ROI/HLC - Up to 60 ~ 80m IR range ensures safety at night - Built-in micro SD/SDHC/SDXC card slot - 12 VDC & POE - IP67 Water and dust resistant, IK10 and vandal proof

Camera giám sát Vantech VP-2691VBP

Hotline (24/7): 0915.111.227

Fanpage Facebook

Liên kết website

Thống kê

  • Đang online 0
  • Hôm nay 0
  • Hôm qua 0
  • Trong tuần 0
  • Trong tháng 0
  • Tổng cộng 0
Camera VANTECH VP-204A
Camera VANTECH VP-204A

Camera VANTECH VP-204A

(1 đánh giá)

VP-204A

VANTECH

12 tháng

- Độ phân giải camera: 700 TV Lines - Ống kính: f=3.6, 6, 8, 12 mm/ F1.2 tùy chọn. - Số đèn LED hồng ngoại: 12 đèn High Power LED. - Tầm quan sát xa 20m - Hỗ trợ: OSD, WDR.

Hotline (24/7): 0915.111.227

Camera quan sát
Mã sản phẩm VP-204A
Hãng sản xuất VANTECH
Bảo hành camera 12 tháng
Độ phân giải 700 TVL
Theo giá trị 1 Triệu – 1.25 Triệu
Camera theo số lượng đèn LEDs 12 HP LEDs
Camera theo loại chip Chip CCD
Độ nhạy sáng tối thiểu 0.01 Lux/ F1.2 (màu), 0 Lux/ F1.2 (khi bật LED hồng ngoại).
Camera theo ống kính Loại 3.6mm
Camera theo loại đèn LEDs Đèn HP Led
Tầm xa hồng ngoại Từ 15-20m
Độ Zoom kỹ thuật số Không có
Hỗ trợ WDR Có
Tiêu chuẩn IP Không hỗ trợ
Hỗ trợ khác Hỗ trợ OSD, WDR và chân đế kèm theo.
Nguồn điện DC 12V
Tương thích ONVIF Không
Nhiệt độ hoạt động -20℃~50℃
Tính năng Push Video Không
Pan / Tilt / Zoom kỹ thuật số Không

 

 

 

Đánh giá sản phẩm

Bình chọn sản phẩm:

Bình luận

Sản phẩm cùng loại

Camera giám sát Vantech VP-4577SM
- LH : 0915.111.227 - Độ phân giải 3.0MP - Chuẩn nén H.265+ - Ống kính cố định 3.6mm - Tích hợp 2 đèn LEDs trợ sáng hỗ trợ 3 chế độ: * Full color khi phát hiện chuyển động của con người * Full Color / STARLIGHT - Cung cấp hình ảnh đầy màu sắc 24/7 với ống kính siêu khẩu độ F1.0 và cảm biến hiệu suất cao - Tích hợp microphone lọc nhiễu - Hỗ trợ PoE / ONVIF
 MUA NGAY

Camera giám sát Vantech VP-4577SM

2,990,000 đ

Camera giám sát Vantech VP-4577SM
- Độ phân giải 3.0MP - Chuẩn nén H.265+ - Ống kính cố định 3.6mm - Tích hợp 2 đèn LEDs trợ sáng hỗ trợ 3 chế độ: * Full color khi phát hiện chuyển động của con người * Full Color / STARLIGHT - Cung cấp hình ảnh đầy màu sắc 24/7 với ống kính siêu khẩu độ F1.0 và cảm biến hiệu suất cao - Tích hợp microphone lọc nhiễu - Hỗ trợ PoE / ONVIF

Camera giám sát Vantech VP-4577SM

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-61592FP
- 6.0 Megapixel Resolution - H.265+/H.265/H.264+/H.264 Video Compression - 1.27 mm Focal Length - Support BLC, HLC, defog, 3D DNR - Up to 15 m IR range ensures safety at night - Built-in micro SD/SDHC/SDXC card slot Smart features: - 360° zero-blind zone image: a fisheye network camera capable of providing a 360 degree panoramic image of its surveillance scene - Heatmap: based on deep learning algorithms, the camera counts people and presents an intuitive map

Camera giám sát Vantech VP-61592FP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-51590
- 3.0 Megapixel Resolution (VP-31590) - 5.0 Megapixel Resolution (VP-51590) - H.265+/H.265/H.264+/H.264 Video Compression - 1.27 mm Focal Length - Support BLC, HLC, defog, 3D DNR - 360° zero-blind zone image: a fisheye network camera capable of providing a 360 degree panoramic image of its surveillance scene - Up to 15 m IR range ensures safety at night - Built-in micro SD/SDHC/SDXC card slot

Camera giám sát Vantech VP-51590

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-31590FP
- 3.0 Megapixel Resolution (VP-31590) - 5.0 Megapixel Resolution (VP-51590) - H.265+/H.265/H.264+/H.264 Video Compression - 1.27 mm Focal Length - Support BLC, HLC, defog, 3D DNR - 360° zero-blind zone image: a fisheye network camera capable of providing a 360 degree panoramic image of its surveillance scene - Up to 15 m IR range ensures safety at night - Built-in micro SD/SDHC/SDXC card slot

Camera giám sát Vantech VP-31590FP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-5237AI
- 2.0 Megapixel Resolution - H.265/H.264 Video Compression - 6.0 ~ 222mm (37X Optical Zoom) - Clear imaging against strong back lighting due to 130 dB WDR technology - Pan and tilt ability enables camera to monitor zones of interest - Support BLC/3D DNR/ROI/HLC - Laser Night Vision distance over 800M in total darkness - Intelligent analytics: Face Detection, Intrusion Detection, Line Crossing Detection, Region Entrance Detection, Region Exiting Detection...

Camera giám sát Vantech VP-5237AI

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-2TD4916F/V2
- 2.0 Megapixel Resolution - 6.7~330mm (49X Optical Zoom), 16X Digital Zoom - High sensitivity thermal module: 640 x 512 resolution - NETD is less than 40 mk (@25° C, F#=1.0) - Supports contrast adjustment - Leading thermal image processing technology: Adaptive AGC, DDE, 3D DNR - Up to 15 palettes of adjustable color - Smart tracking: Panorama, event & multi-scene patrol - Based on AI algorithm: Line crossing, intrusion entrance & exit - Advanced Fire Detection

Camera giám sát Vantech VP-2TD4916F/V2

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-3240PTS
- 2 x 4.0 Megapixel Resolution - 2.8mm Focal Length - Horizontal field of view: 2 x 180° Vertical field of view: 85° - Supports people density detection in panoramic channel Tracking PTZ Camera: - 4.0 Megapixel Resolution - 6.0 ~ 240mm (40X Optical Zoom), 16X Digital Zoom - Clear imaging against strong back lighting due to 140 dB WDR technology - Pan and tilt ability enables camera to monitor zones of interest - Up to 250m IR range ensures safety at night - 36 VDC, Max.150 W - IP66

Camera giám sát Vantech VP-3240PTS

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-2R0842HP
- 2.0 Megapixel Resolution - H.265+/H.265/H.264+/H.264 Video Compression - 6.0 ~ 252mm (42X Optical Zoom), 16X Digital Zoom - Clear imaging against strong back lighting due to 140 dB WDR technology - Pan and tilt ability enables camera to monitor zones of interest - Support BLC/3D DNR/ROI/HLC - Built-in Smart IR. Up to 400m IR distance - 12 VDC & Hi-POE (Max.60W) - IP66 / Ik10 Standard

Camera giám sát Vantech VP-2R0842HP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-2R0732HP
- 2.0 Megapixel Resolution - H.265+/H.265/H.264+/H.264 Video Compression - 4.8 ~ 153mm (32X Optical Zoom) - Clear imaging against strong back lighting due to 130 dB WDR technology - Pan and tilt ability enables camera to monitor zones of interest - Support BLC/3D DNR/ROI/HLC - Up to 150m IR range ensures safety at night - 24 VAC & Hi-POE (Max.60W) - IP66 Water and dust resistant

Camera giám sát Vantech VP-2R0732HP

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-2R0425P
- 2.0 Megapixel Resolution - H.265+/H.265/H.264+/H.264 Video Compression - 4.8 ~ 120mm (25X Optical Zoom) - Clear imaging against strong back lighting due to 130 dB WDR technology - Pan and tilt ability enables camera to monitor zones of interest - Support BLC/3D DNR/ROI/HLC - Up to 100m IR range ensures safety at night - 12 VDC & POE - IP66 Water and dust resistant

Camera giám sát Vantech VP-2R0425P

Hotline (24/7): 0915.111.227

Camera giám sát Vantech VP-51533IP
- 2.0 Megapixel Resolution (VP-21533IP) - 5.0 Megapixel Resolution (VP-51533IP) - H.265+/H.265/H.264+/H.264 Video Compression - 4.5 ~ 148mm (33X Optical Zoom) - Clear imaging against strong back lighting due to 130 dB WDR technology - Support BLC/3D DNR/ROI/HLC - Built-in Smart IR. Up to 400m IR distance - 12 VDC & POE - IP66 Water and dust resistant

Camera giám sát Vantech VP-51533IP

Hotline (24/7): 0915.111.227

Công ty TNHH Thương mại Dịch vụ Công nghệ Thanh Hải

MST: 031.660.9398

  • VP: 337 Kinh Dương Vương, Phuờng An Lạc, Quận Bình Tân, HCM
  • Công ty : 1069/3/4 Quốc lộ 50,Xã Bình Hưng ,Huyện Bình Chánh ,HCM
  • Hotline: 0915.111.227  -  037.9197.222   -  0909.229.453
  • Website: www.camerathanhhai.com.vn
  • E-mail: congtycongnghethanhhai@gmail.com

khu vực liên kết 

uy tín - chất lượng - phục vụ chu đáo - chuyên nghiệp

  • in ấn quảng cáo THANH PHÚC 
  •  Đ/C : 335 ấp thới thuận b,thị trấn thới lai ,huyện thới lai ,thành phố cần thơ - phone: 084.655.88.99 (mr phúc )
  • khu vực cờ đỏ : MR.Hiếu  - điện thoại : 078.95.94.089 

 

Chính sách & Hỗ trợ khách hàng


Đã đăng ký nội dung bản quyền

Copyright© 2021

Designed By GianHangVN

Top

0915.111.227
0 Giỏ hàng