Quick Overview 

• Specifications: Working Voltage Range : 3.5V To 7 V.
• Working Current Range : 0 To 3A.
• Voltage Resolution : 10mV. Current Resolution : 1mA. Error : Voltage < ± 1% , Current < ± 2%.
• Full scale voltage drop : 200mV (When measuring current).
• Working Temperature : 0 – 60?.
• Product Size : 53 X 35 X 14 mm.

Product Description

Usb charger doctor voltage current meter mobile battery tester power detector display data: Voltage current input unsorts, reset button, press it three seconds will reset out usb voltage: 4v-20v ( 1 percent accuracy ) current: 0-3a ( accuracy of 0. 4 percent ) battery capacity (0-99999mah)working time (0-99hour) the working time and capacity have memory function when power off.