Multifunctional USB Checker: This device easily checks the voltage, current, and cumulative current of not only USB devices but also the latest Type-C devices. Simply connect the USB port to see the voltage (V), current (A), time, power (W), cumulative current (Ah), and cumulative power (Wh) at a glance. The surface of this USB voltage and current checker is covered with a transparent protective film that can be selectively removed.
Charging Safety Protection: It features protection functions for overvoltage, undervoltage, and overcurrent, and allows setting the charging time from 1 to 24 hours. By monitoring voltage and current conditions, it protects mobile batteries, iPhones, and various Android smartphones.
Fast Charging Quick Charge 3.0 Compatible: This current and voltage tester supports fast charging QC2.0/QC3.0/MTK-PE/iPhone/Android, etc. It can measure voltage from 3-30V and current from 0-5.1A. It can also measure mobile battery capacity and check the charging performance of USB cables.
OTG Adapter Function: Allows connection of smartphones, USB memory sticks, gamepads, keyboards, etc. via a Type-C tester. (Please note! The Type-C output interface must be connected to a fast-charging device before the display lights up. The display will not light up if the input port is plugged in separately. Some smartphones are not compatible; please be aware of this beforehand.)
Abundant Numerical Display & Compact: Eight pieces of information—current (A), cumulative current (mAh), voltage (V), power (W), cumulative power (Wh), temperature (°C), operating time (h:m:s), and resistance (Ω)—are visible at a glance. There is a button on the upper right of this product; pressing it switches the display mode. Since there is only one button, the function seems to change depending on the number of times it is pressed.
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