MY-B1 pacient call ,nurse intercom system,nurse device can install in sickroom for nurse to use,can call and talk-back  MY-B1 pacient call substation,Features and functions: 1) Between intercom substation and master can call and talk;2) Can output for button of emergency alarm;3) Hand free easy used;4) Connected the master by 4-wire bus cable Production Spec:

Working voltage: 18V

Working current: ≤150mA

Transmit Frequency: 315MHz±75k

Environment tem: -35~60

Dimension: 150X120X70 mm

Ring: electronic ringControl: by Master