... (TTL)Video Signal Input ConnectorMini D-Sub 15-pin VGAFrequency(H/V) 30~80KHz / 60~75HzPower Supply Type: External brickInput ... ControlButtonsAUTO,+,POWER,-,MENUFunctionBrightness, Contrast Ratio, Auto-adjust, Phase, Clock, H/V Location, Languages, Function, ResetTouch screen Type12.1” SAW ... InterfaceUSB and RS232CertificatesETL ,FCC,CE,RoHS Openframe touch LCD monitor with 12.1"SAW Touch screen