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Application: You can easily test the 1-2A output mobile power£¬ mobile phone charger£¬ USB power supply output current is standard or not£¬ Test Method: 1£¬ insert the USB 1-2A output device port. 2£¬ Toggle switch allows the output current between 1A and 2A Switching. Test Standard: The USB power supply / mobile power source is detected by the insertion of the USB output port. If the red light continues to shine£¬ then the power supply reaches the corresponding rated output standard. Else the red light does not shine or flicker£¬ then not reaches. Note: Resistance will be hot when the module is working£¬ the temperature at around 80 ~ 85 °c£¬ please beware hot.