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                   Detailed Product Description 
                   Key Specifications/Special Features: 
- Power adapter: 
- Input voltage: 100 to 240V AC/50Hz 
 - Output voltage: 5V DC
 
 
 - Operating temperature: -10 to +45 degrees Celsius 
 - Store temperature: -10 to +45 degrees Celsius 
 - Store temperature: -20 to +60 degrees Celsius 
 - Relative humidity: 10 to 90% RH (without condensation) 
 - Operating frequency: EGSM 900, GSM 1,800, GSM 850, PCS 1,900MHz (optional) 
 - Communication protocols (including data operation): phase 2/2+ 
 - Wireless control signal transmitting distance: 25m (straight line) 
 - Operating band of wireless siren: 315/433MHz (optional) 
 - Valid listening distance: ≤6m (frontal, 80 degrees) 
 - Image format: JPEG 
 - Image resolution: 160 x 128 pixels, QVGA (320 x 240 pixels), VGA (640 x 480 pixels) 
 - Viewing angle: 
- Horizontal: 68 degrees 
 - Vertical: 68 degrees
 
 
 - Best viewing distance: ≤9m (day time), ≤6m (night time) 
 - Effective sense distance of PIR sensor: ≤6m (obverse) 
 - Lithium-ion battery: 800mAh 
 - Standby time of the battery (depending on network): 8 hours (arming mode), 30 hours (disarming mode)
 
 
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