Wireless battery operated doorbell + kinetic bell push (Eco self-power, no need battery),green and convenient.
Bell push with waterproof IP44 .
With self-learning technology. DIY combination.
Superheterodyne technology anti-interference and static power less than 0.2W.
1* Transmitter (No batter required)
1* Receiver (Eco Self-power)
1*Double-sided adhesive tape
Transmitter, please don't put on metal objects, metal objects has shielding effect to the wireless signal.
IP44 waterproof rating is able to withstand wet and harsh weather conditions. Nonradiative ,
BATTERY-FREE & WATER-PROOF TRANSMITTER: Battery free push-button converts kinetic energy into electric energy, no batteries required, energy saving and environmental protection. Lifespan of bell push is up to 10 years(pressed 15 times per day).
32 sounds selectable on chime and 4-level adjustable volume, Working Range Over 450 feet
LONG WORKING DISTANCE: Supports up to 450 ft of wireless range; make sure you will not miss anyone no matter where you are in your home or garden.
Easy mix-and-match with more receivers, buttons or sensors. Also easy to install and use.