*Self-powered doorbell with full-digital frequency modulation technology,no string code.
*With the strong points:ultra low power design,power saving,ultra long distance remote control, stable signal and strong penetration.
*The indoor receiver is equipped with 28 chord tones and 4 levels of volumes for your choice.
*Outdoor transmitter does not need batteries.No batteries!!built-in energy power generation module for transmitter,so you will never worry about battery replacement and power running out.
*Simple appearance design and elegant, unique style,which will make your house more fashionable.
Transmitter:No battery required
Volume:25-110dB(4-step volume adjustable)
Transmission range:20-50m(depending on the environment)
Receiver operating temperature:-10℃~55℃
Transmitter operating temperature:-20℃~65℃
Package Size: Approach.11*8.3*8cm/4.33*3.27*3.15in
Package Weight: Approach.160g/5.64oz