- ARCELI USB 3.0 meter with high-definition IPS color LCD screen for monitoring voltage, current, capacity, energy, and power. - Clear and precise display of electrical data, ideal for testing chargers, power banks, and USB devices. - Compatible with fast charging protocols QC2.0, QC3.0, iPhone, and Android, automatically identifying the charging type. - Data storage function after power-off, making it easy to track accumulated energy. - 4-digit measurement accuracy, includes impedance measurement and equivalent charging power measurement. - Integrated thermometer with high-precision sensor, allows switching between Celsius and Fahrenheit degrees. - USB 3.0 interface compatible with USB 2.0, supports high current testing and USB storage devices. - Allows evaluation of charger quality by comparing voltage drop under load. - Made of durable ABS, compact size (60 x 22 x 11 mm) and lightweight (14g). - Measurement range: voltage 3.70-30.00V, current 0-4.000A, maximum capacity 99999mAh.