22" Openframe touch LCD monitor Both RS232 and USB interface FCC,CE,CCC,RoHS certificated ... (line) voltage: 100-240 VAC, 50-60 HzOutput voltage/current: 12 volts at 4 amps maxEnvironmentOperating Temp.0~50°CStorage Temp ... , Languages, Function, ResetTouch screen TypeKeetouch 22” SAW 6MM thickness of touch screen sensorTouch System InterfaceUSB and RS232CertificatesETL ,FCC,CE,RoHS