High-Resolution Display: Utilizes a 0.96-inch IPS high-resolution color LCD screen to display charging status, voltage, current, capacity, energy, power, equivalent impedance, temperature, etc. Wide Viewing Angle: Boasts a 160-degree wide viewing angle, high brightness, and long lifespan. Fast charging identification, widely compatible: AT24 supports QC2.0, QC3.0, iPhone 2.4A/2.1A/1A/0.5A, Android DCP, fast charging protocol identification, so you know your phone's charging status. Power-Saving Storage: Features a power-off storage function that saves capacity and energy data when the phone is turned off, making it easier to view later and simplifying the measurement of the energy capacity of the power source's mobile power. Note: Other USB testers that do not have a power-saving storage function cannot test capacity and energy. Precise Measurements: 4-bit precision for more accurate measurements; measurement of impedance and power corresponding to the load; thermometer function, free switching of Celsius and Fahrenheit: uses a high-precision thermistor sensor; USB 3.0 interface: compatible with USB 2.0, supports high-current testing, supports mobile hard disk to USB3.0 interface and U-disk testing. Charger Quality Assessment: Connect the same load, compare the unloaded load and the 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.