Features LOAD TEST MODULE --- By controlling load resistance, this load test module can get different currents to test the power. CLEAR INDICATORS --- Equipped with multiple indicators, the USB load module can clearly display the operation statues. WIDE APPLICATION --- Allows for flexible application in testing electronic equipment, power bank, mobile power, charger. GOOD WORKMANSHIP --- Crafted with excellent workmanship, the USB load tester is not prone to cold joint, very durable. USB PORT --- Enables easy operation, just plug and play. Also very convenient to carry with small size and light weight. Specification: Item Type: USB Load Tester Material: Printed Circuit Board Working Voltage: DC 5V (USB power supply) Function: A USB discharge load tester designed according to Ohm's law (voltage/resistance value = output current), through the two switches above to control load different power resistance values, and obtain 3 kinds of currents, respectively 1A, 2A and 3A. Onboard corresponding different resistance indicator lights and power indicator lights are very clear. Simple to use, you can test the power bank and mobile power charger. Applicable Scenarios: For electronic equipment, power bank, mobile power, charger.  Package List:2 x USB Load Tester Note:1. Do not use the product in a electrostatic environment, otherwise static electricity will damage the electronic components; 2. The USB plug is plugged into the 5V output interface. Because of the resistance value and the maximum power limit of the resistor, it cannot be connected to the fast charging interface above 5V. Package List 2 x USB Load Tester