Intelligent Wireless Doorbell

Specifications: 

38 ringtones to choose from and 3-step volume control (0 ~ 85dB) 

Eye-catching backlight flashes when someone pushes the doorbell. Particularly suitable for the elderly, deaf, and pregnant women

Uses machine-learning to prevent interference from other wireless transmitters Designed to last up to 25 years

Working frequency: 433 MHz

Receiving distance: 300M (in open area)

Transmitter size: 75 × 51 × 20 mm Receiver size: 95 × 65 × 24 mm

Receivers Rated voltage: AC 110V-220V -240V

The transmitter 12V23A battery factory pre-installed (battery not included)