The AT34 uses a 0.96 inch IPS high-definition color LCD screen to display the device's charging status, voltage, current, capacity, energy, power, impedance equivalent, temperature and other indicators at a glance. 160 degree wide viewing angle, high brightness and long service life. Tension: 3.7-30V; Fluent: 0-4A Fast load recognition, widely compatible. Support QC2.0, QC3.0, APPLE 2.4A/2.1A/1A/0.5A, Andriod DCP protocols, identify SAM-SUNG charging protocol, let you know the charging status of the phone. /p> 5-bit resolution for more accurate measurements. The screen can be turned off with a button and has an inverted screen function. Thermometer function using high precision thermistor sensor, Celsius and Fahrenheit free switching. AT34 has power-off storage function, able to store capacity and energy data when the mobile is cut off, which is convenient for later viewing and measurement of mobile power energy capacity. Note: Other USB testers which do not have power-off storage function cannot test capacity and energy. Measure the quality of the charger: connect the same load, compare the no-load and load, the greater the voltage drop, the worse the capacity of the charger, the better the quality; voltage drop is not obvious or voltage rises, charger charging capacity and quality are better. Number of pieces delivered: 1 Blue color Size: 64*22*12mm Note: The data is manual measurement, please allow 1-43cm error, due to differences between light and color. screen, there will be a certain color difference, the specific received in kind prevail.