Measuring voltage: 3,700-30,000V Measuring current: 0-4,0000A Supply voltage: 3,700-30,000v Range capacity measurement: 0-99999 mAh Energy measurement range: 0-99999mWh-999.99Wh Voltage measurement resolution: 0.001V Current measurement resolution: 0.0001 A Power measurement range: 0-120 W Data refresh rate: 0.5 Hz < p>Operating temperature range: 0-45C/32F~113F The AT35 uses a 0.96-inch IPS high-definition color LCD screen to display the status of Device load, voltage, current, capacity, energy, power, equivalent impedance, temperature and other indicators at a glance. 160 degree wide viewing angle, high brightness and long lifespan. AT35 has power-off storage function, capable of storing capacity and energy data when the mobile is off, this which is convenient for later viewing and measuring the energy capacity of mobile power. Note: other USB testers that do not have power-off storage function cannot test the capacity and energy. Measure the quality of the charger: connect the same load, compare the no-load load and the load, the greater the voltage drop, the worse the charger capacity, the better the quality; the voltage drop is not obvious or the voltage increases, the charger's charging capacity and quality are better. Delivered quantity: 1 piece