Wireless Waterproof Outdoor Doorbell No Battery Required Self-Powered Door Bell Sets Home Outdoor Kinetic Ring Chime Doorbells

Wireless Waterproof Outdoor Doorbell No Battery Required Self-Powered Door Bell Sets Home Outdoor Kinetic Ring Chime Doorbells Specification --Type: EU Plug --Operationg Voltage: AC 100-230V --Power Consumption:0.25W --Wireless Frequency: 433MHz --Ringtone Volume:≥50dB/1m+ --Operating Temperature:-10°~ +45° --Wireless Distance: 150Meters (open space) --Receiver Size: L50 X W20 X H84 mm --Transmitter: NO Need Battery --Transmitter Size: L33.2 X W18.3 X H66.84 mm   Feature: 1.32 Songs Home Welcome Door Chimes 2.150M Long Wireless Control Distance 3.Waterproof Door Bell 4.Four leverls of volume 5.Self-Power,No battery required Packing List: --Button + Receiver --Screw --Double-sided tape The self-generating wireless doorbell transmitter does not require batteries, and has a built-in energy collection module, which can convert the pressed mechanical energy into electrical energy, and the electrical energy drives the circuit to work. The communication method of the doorbell is wireless radio frequency, no wiring is required for installation, the volume of the bell is adjustable and there are multiple music tracks to choose from. The doorbell has the function of power-off memory. After power-off, it can be powered on again. The doorbell can remember the last set music track and bell volume, and there is no need to set it manually.