Wirelessly Doorbell Receiver & Transmitter Kit

Features:
4 levels of ringing volume, just click the button to adjust the volume as needed. Even old people can use it with the suitable ringing volume comfortably and conveniently.
There are 38 ringtones for you chose.
IP44 waterproof, withstands various harsh weather conditions
With a reliable wirelessly ranges of 919ft and strong signal,this doorbell is perfect for large residences, businesses. classrooms and more.
Including 1 receiver and 1transimitter kit, easy installation, build your own simple alert system.