RL-3995 doorbell Battery-powered wireless doorbell with shining LED display

- Battery-powered wireless doorbell with shining LED display
- Very friendly to someone hard of hearing
- 60 pleasant chord ringtones
- Learning code technology and digital transmission to avoid interference effectively
- RF: 433.92MHz ±250KHz
- Working distance ≥300m (open area)
- 5 Levels volume adjustable
- Receiver powered by 3*AA alkaline batteries (not included)