Description
Features: 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 children. Uses machine-learning to prevent interference from other wireless transmitters. Designed to last up to 25 years.
Specifications:
Working frequency: 433 MHzReceiving distance: 300M(in open area)Transmitter size: 75 x 51 x 20 mm Receiver size: 95 x 65 x 24 mmReceivers Rated voltage : AC 110V-220V -240V?The transmitter 12V23A battery factory pre-installed (battery not included)
Package Included:
1 Black transmitter and 1 Black receiver
Detail Pictures: