... CCTV Security TesterVideo TestSignal modeNTSC/PAL (Auto Adjust)Display2.8 inch TFT-LCD ,960 x 240 resolutionLCD adjustAdjustable brightness, contrast, color of LCDVideo ... Polymer Batteries, 3.7V DC2800mAhRechargeable4 hours recharging time, work for 15 hoursLow ConsumptionSleeping mode, display battery power stateOther ParametersWork Temperature-10 ...