The wireless entrance alert door chime could notify you when your doors or windows are opened. It is very easy to install, just mount the small transmitter and magnet to any door or window and plug the remote receiver unit into any electrical outlet, that’s it, No wiring required.

Main Features:

Be alert when any opening device is opened without pushing anything. 

52 ringtones(16 chord)to choose from and 4 steps volume control(up to 110dB) 

Simple to use and easy-to-install without the hassle of running any wires 

With up to 500FT operating range in open space,100m audible range 

Eye-catching indicators alert you when the doorbell can't be heard 

Expandable, allowing you to pair various transmitters to the receiver 

Using learning code to prevent interference from other wireless transmitters 

Smart memory, automatically save selected ringtone after a power outage 

High quality, approved with CE,FCC,RoHS certification