Simple and practical; Small size convenient to carry no external power and other accessory equipment needed plug and play; Can detect any USB output of power supply charger computer car charger and mobile power easy to measure out no-load voltage loading voltage and devices working current of USB output and to judge whether the performance of the charger and charging cable meet the requirements; Simple to operate; Suitable for 3~7.5V / 0~2.5A 3 digits digital USB voltage and current alternate display the result clear great for factory laboratory and normal users. Brand NA Model USB-AV Quantity 1 Color Translucent blue + silver Material ABS Features Detection range: Voltage: 3~7.5V; Current: 0~2.5A; Error: Voltage: less than +/- 1% Current :less than 2% Application Compact and easy to carry no additional power supply plug and play; It can easily measure the output voltage of the USB port and the device operating current or load voltage Packing List 1 x USB mobile power current detector