The testers are widely used in the quality inspection of 3C digital peripheral products and are the first choice for digital gamers and electronics enthusiasts. Real-time detection of the state of charge, voltage, current, power and other devices indicators at a glance; Measurement voltage: 3.7V-30V; Measuring current: 0-4A. The AT34 uses a high-resolution 0.96-inch IPS color LCD screen to display the charging status, voltage, current, capacity, energy, See the device's power, equivalent impedance, temperature, and other indicators at a glance. 160 degree wide viewing angle, high brightness and long lifespan. Fast Charging Detection, Widely Compatible: AT24 supports QC2.0, QC3.0, APPLE 2.4A/2.1A/1A/0.5A, Andriod DCP, S famous phone charging protocol identification, let you know the phone charging status. Power-off storage, data is guaranteed: AT34 has a power-off storage function, which can store capacity and energy data when the power of the mobile device is cut off, which is convenient for later viewing and measuring the energy capacity of mobile phone, Mobile phone power.Note: Other USB testers that don't have power-off memory function can't test capacity and power. 4-bit precision for more precise measurements; Measure the equivalent impedance and power to the load; Thermometer function, switching without Celsius and Fahrenheit: using high-precision thermistor sensor; USB 3.0 interface: Compatible with USB 2.0, high support current test, support USB3.0 interface for mobile hard disk and U disk test. Measure the quality of the charger: connect the same load , compare no-load and load, the greater the voltage drop, the worse the charger capacity, the worse the quality; the voltage drop is not obvious or the voltage increases (must loss compensation function) The better the charging capacity of this charger, the better the quality. Style name: AT34 Technical parameters: Model: AT34 Measurement voltage: 3.7-30V Current measurement: 0-4A Capacitance measurement range: 0-99999mAh Energy measurement range: 0-99999mAh-999.99Wh Load impedance measurement range: 1 -999.9 Temperature measurement range: 0C- 80C / 32F-176F Operating Temperature Range: 0C-45C / 32F-113F Product Size: 64mm x 22mm x 12mm Screen: 0.96 inch color LCD Voltage measurement resolution: 0.01V Current measurement resolution: 0.001A < p>Voltage measurement accuracy: (0.8% + 4 words) 25 C Current measurement accuracy: (1% + 4 words) 25 C Power measurement range: 0 120 W Temperature measurement error: 3 C / 6 F Update rate: 2 Hz Application: Widely used in the quality inspection of 3C digital peripheral products, the testers are the first choice for digital gamers and electronics enthusiasts. Real-time detection of device charge status, voltage, current, power and other indicators a glance; Measurement voltage: 3.7V-30V; Measuring current: 0-4A; Thermometer function, Celsius and Fahrenheit free switching: With a high-precision thermistor sensor, it can measure the ambient temperature (when it is first turned on), and also know the status of the real-time tester's operating temperature. USB 3.0 interface: compatible with USB 2.0, support high current test, support USB3.0 interface for mobile hard disk and U disk test. Package Included< /p> 1 * AT34 USB Tester Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.