AITENG V018G Life Waterproof Battery-Free Wireless Doorbell, 1 Receiver + 1 x Transmitter, Receiver Distance: 130m, US Plug Filter-Screen Protection Film One Package Size 21cm *

One Package Size 21cm * 13cm * 1cm / 8

Charging: less than 5V 1

PAL video capture: 720 x 576

comfortable to wear

AITENG V018G Life Waterproof Battery-Free Wireless Doorbell, 1 Receiver + 1 x Transmitter, Receiver Distance: 130m, US Plug Filter-Screen Protection Film One Package Size 21cm *1. This is a wireless doorbell, but no more battery needed or worry battery runs out ! By pressing the push button, it converts kinetic energy into an electrical signal to ring your wireless doorbells. So no more worrying your push button runs out of batteries and no more hassling in buying awkward weird batteries to run your push button. You will always be able to hear your doorbells ring! 2. Do not need any battery or power line to charge the