Wireless Digital DoorbellThe 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: 110-240VWorking Voltage of the transmitter: 4.5V (3*AAA battery not included)Music: 38 music optionalVolume:three levels (high,medium and low,audio and silence can be set)Working distance:up to 70 metersTransmitter induction distance:3-7 metersReceiver Quantity:1Transmitter Quantity:1Receiver Size:76*80*33mmTransmitter Size: 80*59*45mmPackage Information:Package Size:Approach.10*8.8*8.8cm/3.94*3.46*3.46inPackage Weight:Approach.160g/5.64ozPackage List:1* EU Indoor Unit(Receiver)1* Outdoor Unit(Transmitter)1*Bag of Screws1*Bag of Mounting Bracket1* User Manual(English)