Wireless Digital Doorbell The product is shipped based on the color or size of the main image of the product page. Features: *Wireless human induction,using super quality imported probe,not omission,send audible sound,alerting you that somebody is approaching. *Wide usage places including supermarkets, offices, convenience stores, shops, hotels, factories and homes and other places. *Special design and beautiful appearance.Simple operation for attaching it anywhere you want. *Working range up to 70 meters between receiver and transmitter,which allows you to place it a good distance from the receiver to warn you of arrival and departure of family members, unwanted guests or anyone who visits your home or business. *Super speaker, with 38 music optional.3 level of adjustable sound volume,press the button and adjust the volume. Specifications: Working Voltage of the receiver: 110-240V Working Voltage of the transmitter: 4.5V (3*AAA battery not included) Music: 38 music optional Volume:three levels (high,medium and low,audio and silence can be set) Working distance:up to 70 meters Transmitter induction distance:3-7 meters Receiver Quantity:1 Transmitter Quantity:1 Receiver Size:76*80*33mm Transmitter Size: 80*59*45mm Package Information: Package Size:Approach.10*8.8*8.8cm/3.94*3.46*3.46in Package Weight:Approach.160g/5.64oz Package List: 1* EU Indoor Unit(Receiver) 1* Outdoor Unit(Transmitter) 1*Bag of Screws 1*Bag of Mounting Bracket 1* User Manual(English)