Features：
It has doorbell function, can remind user to set alarm. Both sides have magnets. Easy to install and change batteries.
Technical parameters:
★ Power supplied 12V（inside battery12V）
★ Transmission frequency:433MHz±0.5 MHz
★ Sending distance: No obstacle 80m
★ static current: ≤10uA
★ Alarm current：≤30mA(door bell not work) ≤80mA(door bell work)
★ Alarm distance: 20mm
★ Work condition: temperature -10～40℃
★ Humidity ≤90%
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Img 1
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