The concept of our colorful LED light doorbell revolves around integrating eye-catching LED lights into the doorbell unit, offering a visually striking and customizable way to alert occupants to the presence of visitors. And you can learn more from below discription. - Wireless doorbell chime is power by 3*1.5V AA battery. - 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 desir…