The AT34 uses a 0.96-inch high-definition IPS color LCD screen to display the device's charging status in real time, with indicators such as voltage, current, capacity, energy, power, equivalent impedance and temperature at a glance! Widely compatible quick charge recognition The AT34 supports charging protocols fast QC2.0, QC3.0, APPLE2.4A/2.1A/1A/0.5A, Android DCP and SAMSUNG, which let you know the charging status of your mobile phone! Function Power-off storage: AT34 contains 2 groups of power-off storage function, when the data group is O group, the current capacity and energy are temporarily stored when the device is powered off, then flash to remind the last data when the next power-on, when the accumulated capacity exceeds 1mAh, the last data is automatically cleared and the accumulation starts again. When the data group is group 1, the current capacity and energy are stored when the device is turned off, and the totalization continues when the device is turned on again! Impedance measurement equivalent and load power: Clearly understand the load impedance and current discharge power. Better understanding of the load usage range, easier and faster to use.