... camera 4. Audio input testing 5. Digital multimeter, voltage, current, resistance and capacitance can be tested, continuity testing, ... the LAN cable. 12. Multi-interface and Multi-baud rate. Support RS232 ,RS485 and RS422 interface; baud rate ranging from 150, ... TesterVideo TestSignal modeNTSC/PAL (Auto adapt)Display3.5 inch digital TFT-LCD ,960 x 240 resolutionLCD adjustmentBrightness, Contrast, ...