1Coarse & Fine Encoder Knob: SPS-V bench power supply upgrades from traditional potentiometer coarse & fine adjustment knobs to encoder coarse & fine knobs making it more convenient to set your desired voltage and current and greatly improve your work efficiency!! The coarse knob sets the value before the decimal point, and the fine knob sets the value after the decimal point. (Setting resolution 0.01V/0.001A). 2USB-A & USB-C 20W Quick-Charge: The desktop power supply features Type-A and Type-C dual charging ports, both supporting 20W fast charging. Convenient for charging your smartphone and powering up your Arduino UNO, Raspberry Pi, or other electronic modules for your projects. 3Output ON/OFF Button: With a single press of the added output button, you can easily switch the output ON/OFF. When you want to adjust settings, you don't have to remove the load or turn off the power each time!! 4Functions & Protection: AC115V/230V selectable input, OCP over-current protection, Temperature