USB Volt Current Voltage Doctor Charger Capacity Tester Meter Power Bank Top Quality Features: This is the mini USB meter. It can measure voltage, current, power and capacity. It can clearly display all the data. Can easily measure the USB ( PC USB, cell phone charger, car charger , mobile power , etc. ) port and device operating current and the output voltage charge-discharge capacity, performance, and judge the performance of the charging cable charging equipment, this tester can meet the requirements Fit to factories, laboratories and personal use, wide range and Easy to use, easy to take alone, no additional power supply, Plug and play. Specifications: Model: KWS-V20 Material: Plastic Color: Blue Voltage: 4-30V+/-1% Current: 0-3A+/-1% Time: 0-99H Size: 59*23*13.5mm Net weight: 19g Packing Includes: 1 * Current Voltage Capacity Tester