... (operating temperature): 57°C +/-2.7°Cl (sound level):≥85dB(3M,a)l (working temperature):-10°C~ +60°Cl (working humidity ... products are Home PSTN/GSM Security Alarm System, 3G Alarm System, GSM Power Alarm, Video Monitoring system, Wireless Remote controller, RF Transmitter/Receiver ... on. We can also research and develop wireless remote control system based on clients’ needs, which are widely used in ...