1. Contains 9 sets of power outage saving functions. 2. Temporarily store current capacity and energy when power is off. 3. Reopen the opportunity to accumulate the current capacity and energy used. 4. Manual removal if no accumulation is required. 5. Voltage current and capacity display on the same LCD screen, no need for cumbersome operations, only need to connect to the USB interface, you can monitor the phones charging status in real time. 6. Intelligently memory charging capacity, can save the mAH input from 9 sets of charging devices after power off. Easy to view and check whether the charging devices capacitance is true. 7. U disk current detection, the working current of the u disk is between 50-100mA, when is exceeds 100mA, the u disk may be faulty. 8. USB interface voltage detection, the external voltage of the USB interface on the computer is 5V+/-5%, the output current is relatively constant, generally 500mA, and the notebook computer only has 100mA. Specifications: 1. Material: ABS 2. Color: White, Black 3. Current: 0-5A 4. Voltage: 4-30V 5. Timing: 0-99 hours 6. Power: 0-150W 7. Capacity: 0-999999mAh 8. Inner temperature: 0-80 degree C 9. Divide into groups: 0-9 group 10. Charging resistance: 0-999.9ohms 11. Positive voltage: 0-10V 12. Negative voltage: 0-10V 13. Item size: 56.6 x 24.7 x 11.2mm 14. Item weight: 13.9g 15. Package size: 14.7 x 9.4 x 1.2cm/5.78*3.70*0.47in 16. Package weight: 17.3g