Features:*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.*32 different sounds for choice, you can change the music by the music selection button. Volume adjustment: 3 level of adjustable sound volume, press the button and adjust the volume.*3 modes for your choice: doorbell mode, music mode, alarm mode. Strong sensitivity, good drop resistance, sound sweet.*Easy Installation: With the double-sided adhesive sticker, you can stick the door bell anywhere you want, or you can use the screws to fast the door bell on the wall, wood board, aluminum board etc.*Wide usage scope: Suitable for dwelling houses,apartments, shops, offices, factories and so on.Specifications:Type: Induction doorbellWorking Voltage: 1.5V Power consumption: 1WPower Supply: DC9V or 3*AAA batteries (battery lifetime: about 1-2 months, the product does not contain the battery)Detection distance: 0-8 metersDetection angle: Up and down 60 degrees, left and right 110 degreesVolume: 80db Modes: 3(doorbell mode, music mode, alarm mode optional) Volume Range:3 Levels Music: 32 Options Waterproof: Not SupportColor: WhiteMaterial: ABSScope: Shops, families, shopping mallsPackage Information:Package Size: Approach. 11*11*3cm / 4.3*4.3*1.2inPackage Weight: Approach. 110g/3.9ozPackage List:1 * Doorbell1 * Bag of Screws1 * Adhesive Tape