Wireless ding dong door bell
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* Power supply: AAA batteries (battery not included)
* Detection range: 1-4m
* Volume: 3 levels adjustable
* Induction method: infrared sensor triggered
* 3 modes: Voice alarm, Voice mode: human voice; Alarm mode: keeps you alert of intrusions; Music mode: as a doorbell, with 32 melodies to welcome your guests
* Detection angle: horizontal angle 110 degrees, vertical angle 15 degrees
* Main function: automatic body recognition, wide-angle detection. Adjustable direction (with stand). Built-in speakers, alarm volume 75-95dB
* Installation: easy to install by yourself
* Installation height: 1.5m-2.5m