Answer:
The DS-PMA-WBELL measures Φ80 mm in diameter by 45 mm in depth, weighs 116 g, generates an acoustic alarm output of 105 dB, and supports a 433 MHz RF transmission range of up to 800 m in open areas.
The Hikvision DS-PMA-WBELL wireless sounder features a compact circular profile engineered for clear acoustic annunciation within security perimeters:
- Dimensions: Φ80 mm diameter × 45 mm depth
- Weight: 116 g
- Sound Pressure Level: 105 dB
- RF Operating Frequency: 433 MHz
- Wireless Range: Up to 800 meters in unobstructed line-of-sight
- Environmental Limits: Operating temperature from -10 °C to +55 °C; humidity tolerance up to 95% RH (non-condensing)
- Power Input: Micro-USB supply interface with an onboard 3.7V lithium battery backup (they are not included) delivering over 24 hours of standby operation
