KNACRO Dual USB current and voltage meter, With load resistor LCD liquid crystal display screen, dual channel, automatic identification battery, charging capacity treasure detection test The charging voltage and current use of work: microUSB1 and microUSB2 input voltage requirements for the at least one channel is 4.8V - 5.5V. 5V2A power supply to the high-quality, the best line compensation or the original assembly. Unless the test, it is not advisable to use poor quality power supply. Size: 90 * 50 * 17 mm / 3.56 * 1.96 * 065 in;Weight: 90g / 3.15oz;Load resistance:Yes;Version: no shell+load resistor Dual channel can work independently, with power off memory.It can detect voltage USB porthe connected equipment current,mobile power battery capacity,detection USB cable, detection batteries, etc. With automatic identification chip, it can be used with 2A5V power to the Android or Apple devices to achieve fast charge. LCD module with backlight display, clear, power, information-rich, direct, voltage, current, mA, power, watt hours charging time; soft backlighting, not dazzling, there is glimmer mode, direct reading at night. Five data display,display a wealth of information:Voltage, current, mA, power, Wh. Charging time.