Features: Can be used as a fan speed controllers, USB adjustable desktop small power supplies, USB adjustable charging cables, routers poweroff backup power supplies, USB adjustable boost cable, combined with power sources to instantly change various mobile adjustable power supplies, very practical. Numericals control setting for voltage and current (current limit), with voltage step of 0.010V/0.10V and current step of 0.0010A/0.010A, precise adjustment, and display. LCD displays input voltage, output voltage, temperature, current, power, capacity statistics, and time statistics. With USB female output, it is convenient to connect USB interfaces devices such as USB fan Not need screw quick wiring terminals, press type wiring and unplugging, no need to tighten screws, convenient and fast. Specifications: Component:PCB Size:Approx.4x9cm/1.57x3.54inch Input voltage: 4-13V (USB male, MicroUSB, TYEPE C 3 input interfaces) Output voltage: 1-30V (fast wiring terminals output, USB female output, note that the two is directly connecting, carefully check the output voltage before inserting the USB device!) Output current: 0-2A(In constant voltage modes, the output current is adaptive according to the load size and is not adjustable. If you set limit current to 1.0A, when the load current is greater than 1.0A, it will automatically enter constant current modes and output 1.0A) Package Includes: 1pc USB Power Module note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.