... wireless call system Low price nurse call system Y-40C for hospital Y-40C nurse call systemMain functions: 1.Numeral coding ... ,with voice prompt, ding dong or music are optional, 12 polyphonic ringtones for choice,16 level volume can be adjustable. The time of ... status of 40 routes of transmitters,indicator light flickering stands for new calling info5.Receiver can externally connect with flashing light ...