UT658 USB tester is a new equipment to test the quality of charger/power bank for 3C products. It can give a comprehensive detection for the charging equipment, such as output voltage, output current, output capacity, output voltage stability, etc. With this instrument, you can test charging current with different charging cable, allowing you to select the optimal charging cable and saving the charging time for you. Input Voltage: DC 3V-9V Voltage Resolution: 0.01V Voltage Accuracy: 1% Current Range: 0A-3A Current Resolution: 0.01A Current Accuracy: (1%+2) Capacity: 0-9999mAH Data Storage: 10 Display: 26*17mm LCD Alarm: Yes Working Temperature: 0C~40C Storage Temperature: -10C~50C Interface: USB Dimensions: 84 * 29 * 12mm / 3.3 * 1.14 * 0.47in Weight: 27g / 0.97oz Package Size: 17 * 14 * 1.5cm / 6.7 * 5.5 * 0.6in Package Weight: 45g / 1.58oz