AITENG V018G Life Waterproof Battery-Free Wireless Doorbell, 1 Receiver + 1 x Transmitter, Receiver Distance: 130m, US Plug Filter-Screen Protection Film The turnable part is irreversible

The turnable part is irreversible

Charging: less than 5V 1

40HQ: 1887 cartons * 20 pcs = 37740 pcs

Strong adsorption and adhesion

PAL video capture: 720 x 576

AITENG V018G Life Waterproof Battery-Free Wireless Doorbell, 1 Receiver + 1 x Transmitter, Receiver Distance: 130m, US Plug Filter-Screen Protection Film The turnable part is irreversible1. 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