AVM521CN

The AVTECH AVM521CN is a 2MP Full HD IR dome IP camera (CN variant likely indicating specific regional features) designed for indoor surveillance with WDR for backlit scenes, built-in microphone, and PoE support for easy installation.
It delivers 1920×1080 resolution at 30 fps using H.264/MJPEG compression with up to 4 simultaneous streams, supports motion detection, privacy masks, PIR sensor, and MicroSD storage up to 64GB.
Key Specifications
Feature
Specification
Image Sensor
1/2.8" Sony CMOS ​
Resolution
1920 × 1080 @ 30 fps ​
Lens
f3.8mm / F1.5 (73.2°H/42.8°V FOV) ​
Night Vision
IR up to 15 m (1 LED) 
Min. Illumination
0.1 lux @ F1.5; 0 lux IR on ​
Audio
Built-in microphone; two-way audio ​
Smart Features
WDR, motion detection, PIR sensor ​
Network
PoE (802.3af), ONVIF, 10/100 Ethernet ​
Storage
MicroSD up to 64 GB ​
Power
DC 12V/1A or PoE (max 6W) ​