Description: It can measure the USB-powered devices and easy to use and practical. 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. Detect any USB charger such as PC USB, home charger, car charger,Computer,and so on wide range of applications. USB monitor will automatically cut off when the device is full charged, makes it controllable and more secure when charging. Specification: Size:70 * 22 * 13mm/2.76 * 0.87 * 0.51 inch Weight:20g Voltage: 4V-20V ( 1% accuracy ) Current: 0-3A ( 1% accuracy ) Battery Capacity (0-99999mah) Working time (0-99Hour) The working time and Capacity have Memory function when power off Package Includes: 1 Piece USB Current Voltage Tester
