SecurityMan SM-82-2PK is a 2pcs pack wireless smart doorbell devices. It is cost effective and fully compatible with Air-Alarm II series alarm system. Users can add them as many as needed for their wireless alarm systems of SecurityMan brand.
- Operating power: internal rechargeable Li-battery (3.7 Volt/200mAh)
- Wireless transmitting distance: up to 300 ft. (in open area)
- Service life: up to 3 years
- ON/OFF switch built-in
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