3 in 1 USB Tester Current Voltage Digital Charger Capacity Detector

3 in 1 Digital Multi-function USB Tester USB Multimeter for Mobile Phone Power Voltage Current Capacity detecting and USB Charger Testing

Input USB : RTZ, Reset button, press it three seconds will reset

Out USB : 

• Voltage: 4V-20V ( 1% accuracy )
• Current: 0-3A ( accuracy of 0.4% )
• Battery Capacity: (0-99999mah)
• Working time: (0-99Hour)

The working time and capacity have memory function when power off.

Package List : 

• 1 x 3 in 1 USB Charger Tester