Wireless Digital Doorbell

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.