... equipment, and testing the Fiber Optic Patch Cord , etc.Digital Multimeter, performs AD/DC Voltage, AC/DC Current, Resistor, ... CCTV Security TesterVideo TestSignal modeNTSC/PAL (Auto Adjust)Display3.5 inch TFT-LCD ,960 x 240 resolutionLCD adjustAdjustable brightness, contrast, ... range-6600~+6600AC/DC Voltage0-600V Auto/Manual ranging, 0.1mV resolutionAC/DC Current6.6mA, 66mA, 660mA, 10A ...