Let's know more aobut one of Advent's most popular wireless doorbell, it combines the functions of wireless doorbell and led night light. Learn more features as below: - Doorbell chime is power by universal input voltage 100-240v. - Transmitter is self-powered with kinetic technology, it generate electricity by itself continuously when press the bell push button by finger, the lifetime is as long as 20,0000 presses. - Operating range up to 150 metres on open air, which is applicable for villa, multi-story houses or big property. - The transmitter is waterproof IP44, better suited to withdraw tough working environment. - 32 sounds selectable on chime, you can pick your desired ringtongs from our door chime, including one irabic song. - It supports 4 level volume adjustment, the Ma…