ITEM NAME:USB 4-20V Voltage Meter Current Battery Tester Support QC2.0 Voltmeter #JT1 Product Description Description: USB 4-20V Voltage Meter Current Detector Battery Tester Support QC2.0 USB Charger Voltmeter Feature: 1. Battery capacity display window (0-99999mAh). 2. Working hours and vacancy showed memory function after power failure. 3. Working time display window (0-99H) unit minutes. Specification: Voltage: 4-20V Current: 0-3A Current resolution: 0.01A Weight: about 20g Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding. Included: 1 x USB Voltage Meter Current Detector.Battery capacity display window (0-99999mAh). Current: 0-3A. Current resolution: 0.01A. Due to the different display and different light, the picture may not show the actual color of the item. If item is defective after 3 months, you can still send it back to us.