Fivebit or sixbit display can be switched by one button, with the maximum resolution of 0.00001, enabling realtime monitoring of the subtle changes in voltage, current and power during recharging. This product uses USB3.0 interface, 9 pin design, downward compatible with USB2.0, and offers a higher transmission rate than USB2.0. It can directly test the recharger agreement of some mobile phones. It is small in size, so you can take it with you to anywhere you want to use it, or you can take it and share it with your friends. This product can record 10 sets of measurement data, you can use the data you get to calculate the capacity of battery. Use scenarios At home or in a workshop, monitor and record charging performance of power banks, battery packs, or other rechargeable devices in real time with resolution. Test smartphone chargers and charging cables, including directly testing the recharger agreement of some mobile phones. Take on the go for field testing of USB power supplies, car chargers, or travel adapters, then use the stored data to estimate battery capacity.