Specifications
1)Measuring range: DC 3~8V Volt Amp Voltmeter Ammeter Voltage Current Meter2)DC 3~8V 0~3A blue Color
0.4inch LED Digit Red Display USB Power Charger Voltage Current Tester 
Specifications:
Available charging, data transmission
Voltage, current switching display
Measuring range: DC 3~8V
Current: 0~3A
Error: 1%
Screen size: 0.4inch
Dimensions: 2.68x0.91x0.47inch (6.8x2.3x1.2cm)
Color: blue
Compact and easy to carry
Power free, plug and play
It can easily measure output voltage of the USB port and the device operating current or load voltage
Packing content:
1 x USB Voltage Current Tester