... Transmission equipment, and testing the Fiber Optic Patch Cord , etc.Digital MultimeterMulti-MeterVoltage, current, resistance and capacitance measuring, continuity testing, diode ... -10°C---+50°CWork Humidity30%-90%Dimension/Weight112mmx189mmx47mm / 500g FCC CE certificate 3.5 inch CCTV PTZ control STest-895-3.5M