Features: * Guest Welcome Device & Anti-Theft Alarm Doorbell: When the customer is within the detection range, welcome your guests with a beautiful song or human voice automatically; Motion sensor, motion-triggered alarm, keep you aware of intruders or visitors anywhere around your house. * 32 different sounds for choice, you can change the music by the music selection button. Volume adjustment: 3 level adjustable sound volume, press the button and adjust the volume. * 3 modes for your choice: doorbell mode, music mode, alarm mode. Strong sensitivity, good resistance to decline, sweet sound. * Easy installation: With the double-sided adhesive sticker, you can stick the doorbell anywhere you want, or you can use the screws to fasten the doorbell on the wall, wood panels, aluminum panels, etc. * Wide scope of use: Suitable for residential houses, apartments, shops, offices, factories and so on. Specifications: Type: induction doorbell Voltage: 1.5V Consumption: 1W Power supply: DC9V or