The G4 is a perfect solution for self powered door bells. The transmitter does not require batteries and is powered by piezo electric technology. Furthermore the door bell is equipped with an advanced memory function that saves your preset settings after the occurrence of a power-cut.

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Features:

1. Self-powered doorbell that requires no batteries.

2. Receiving distance: 80M Remote (in open area)

3. Relay function that can extend the wireless range

4. 36 ring tones 5 level volume with 0-105dB (can be mute)

5. Ring differently when press different transmitters

6. Transmitter service life: more than 200,000 times

7. Transmitter Feature: IPX7 outdoor waterproof

8. Transmitter Size:83 x 46 x 20 mm, Receiver Size: 83 x 48 x 23.5 mm