Wireless Doorbell 315MHz or 433MHz Used for Hospital ,Home ,Office & Apartment Quality Choice

Specifications

The world's first batteryfree wireless doorbell with self-powered doorbell button.

No batteries, no pollution.

No wires, no limits.

20 years service life.

Super long distances of 120  meters.

Product Overview:

Battery-free wireless doorbell chime uses energy harvesting technology. Mechanical energy produced by user’s pressure on the button could be changed into electric energy. No wiring, external power, or batteries are required. wireless doorbell plug in

Features &benefits

280 meters transmission range in the open

20 years service life

Self-powered transmitter, no batteries or external power required.

16 polyphony ring tones, built-in amplifier, good sound quality makes it pleasant to hear.

Self-learning code system automatically adjusts to eliminate interference

Tech Intro

Transmitters use the unique PUSH-RF technology which is the energy harvesting wireless technology and ultra low power technology. When the button is pressed, it will trigger the micro-generator, the direction of the magnetic circuit in the micro-generator would change. The rapid magnetic flux change leads to an induced voltage, in other words, mechanical energy is changed into electric energy.

RF-transceiver of the receivers receive the wireless signals, microcontroller identifies the signals. If the signals are right and the pairing between receiver and transmitter is successful, the music chip in the receivers will be triggered; then the loudspeaker plays beautiful music to tell the host there’s a visitor waiting at the door.