LOTW-BRO Universal USB Moblie Device Power Multi-meter Voltmeter Ammeter Capacity Monitor Test Charging Voltage Current High Precision LCD Display

This universal multi-meter works as both voltage and current monitor.
It is a necessary tool for you to validate capacity or charging efficiency for your power banks, or read charging voltage and current for other purposes.
Product Parameters:
1. Input Voltage: 3-7V
2. Input Current: < 3.5A
3. Capacity: 0-19999mAh
4. LCD displays voltage and current simultaneously
5. Save data each time power off
6. High precise current calibration function
7. High and low voltage alarm