This device will measure the standard current and voltage being drawn from a USB port, but additionally has some extra features, beyond the fancy color LCD display. It can measure the capacity of a device charging from it in milliamp-hours and watt-hours, and can measure the load impedance of the device being powered from the USB port. It also measures temperature as well.

Specifications:

Voltage measurement range:3.70-30.00V

Voltage measurement resolution:0.01V

Current measurement range: 0-4.000A

Current measurement resolution: 0.001A

Capacity accumulation range: 0-99999mAh

Voltage measurement accuracy:±(0.8％+4digits at 25℃)

Energy accumulation range:0-99999mWh 999.99Wh

Current measurement accuracy: ±(1％+4 digits, at 25℃)

Load impedance range: 1Ω-9999.9Ω

Power measurement range:0-120W

Temperature range:0℃~80℃/32℉~176℉

Temperature measurement error:± 3℃/ ± 6℉

Working temperature range: 0~45℃