3 in 1 USB Voltmeter Current Voltage Capacity Tester DC Digital Volt Current Meter Charger Capacity Detector for Mobile Power

Good luck with your favorite purchases3 in 1 USB Voltmeter Current Voltage Capacity Tester DC Digital Volt Current Meter Charger Capacity Detector for Mobile Power Test

1. USB input 2.RTZ, reset button, press it three seconds reset 3. USB output 4. Voltage: 4V-20V (1% accuracy) 5. Current: 0-3A (accuracy 0.4%) 6. Battery capacity (0-99999 mAh) 7. Working time (0-99 hours) 8. Working time and capacity have memory function when power off 10. Dimensions: 7.3cm * 2.3cm * 1.35cm (L x W x H)