Features:● Input port connected to output port
● Out port connected to USB data cable port
● Can test USB charging current， voltage， intelligent devices
● Portable design， easy to carry， can be put into pocket
● Easy to find digital devices charging problem
● LCD screen， easy to read the data

Specifications:
● Input :?3 - 15V / 50mA - 3500mA
● Output: 3 - 15V / 50mA - 3500mA
● Capacity range: 0 - 19999mAh

Operate:
● Clear the data， press the reset button for 4 seconds
● Check the data， double-click the reset button to check， double-click again to quit Package weight: 0.047 kg
Product Size(L x W x H): 8.20 x 2.30 x 1.50 cm / 3.23 x 0.91 x 0.59 inches
Package Size(L x W x H): 9.00 x 3.00 x 2.00 cm / 3.54 x 1.18 x 0.79 inches Package Contents: 1 x USB Voltmeter Ammeter Detector