The Keweisi KWS-V20 USB meter is a compact device that allows you to measure voltage and current at the same time in USB ports. Just plug it between the USB socket of the charger or computer and the receiving device, such as a phone, flash drive or external drive. The meter provides voltage and amperage information to monitor the performance of the USB ports and the charging process of the devices.

Technical specifications:
Voltage measurement range: 4-20 V DC (±1% accuracy)
Current measurement range: 0.3-3 A DC (±1% accuracy)
Charging capacity: 0-99 999 mAh
Charging time: 0-99 hours and 59 minutes
Dimensions: 72 mm x 23 mm

The device is easy to use and does not require driver installation. It is ideal for controlling and checking the current efficiency of USB ports, monitoring the charging of power banks, tablets and smartphones.