Designed for the blind ,hearing impaired and senior care.
Great for noisy environments where the doorbell can't be heard.
52 ringtones to choose from and 4 steps volume control(25~110dB).
Up to 1000 foot operating range between receiver and transmitter.
Approved with CE,FCC,RoHS certification.
Operating voltage of vibrating receiver: DC 3V(2*AAA battery)
Operating voltage of transmitter:DC 12V(1*23A battery)
Wireless Range:1000FT in the Open Air; 100~500 ft with doors and walls
Selectable Ringtone: 52 Options
Volume Range: 4 Levels (up to 110 dB)
Working Frequency: 433.92 MHz±280KHz
Working Temperature: -30℃~70℃