... RS422,RS485,PTZ CCTV TESTER 3.5-Inch TFT LCD CCTV TESTER PRO With High Stability Digital Multimeter ... modeNTSC/PAL (Auto adapt)Display3.5 inch digital TFT-LCD ,960 x 240 resolutionLCD adjustmentBrightness, Contrast, Saturation adjustableVideo ... ,3000mAhRechargeableAfter charging 3-4 hour, working time lasts 12 hoursLow ConsumptionEnergy saving technologyGeneralWorking Temperature-30°C---+70°CWorking ...