*Guest welcome device&anti-theft alarm doorbell:when the guest is into the detection range, welcome your guests with beautiful song or human voice automatically;motion detector,alarm triggered by motion,keeping you aware of intruders or visitors anywhere around your home.
*16 different sounds for choice,you can change the music by the music selection button.
*3 modes for your choice: voice mode,music mode,alarm mode.
*Wide usage scope:Suitable for dwelling houses,apartments,shops, offices,factories and so on.
*Volume adjustment: 3 level of adjustable sound volume,press the button and adjust the volume.
Power supply: 3*AAA 1.5V batteries;9V 1A external power supply(Both not included)