Litong 037 0.4" LCD 4-Digit Red Display USB Power Charger Voltage Current Tester (3~8V / 0~3A)
Voltage current switching display; Measuring range: DC 3~8V; Current: 0~3A; Error: 1%; Portable and convenient no need power supply plug and play; It can measure output voltage of the USB port and the device working current or load voltage.