Plug and play with any USB port, and the input terminal is a TYPE-C female port, perfectly compatible with TYPE-C port chargers (PD). Any USB port can be used as a power supply device, charging head/power bank/PC/notebook/router/NAS, etc. Designed for voltage regulation of small USB-powered devices, the output is a USB-A female port Built-in boost and buck circuit, the output can be turned off, and the voltage is easy to adjust. Voltage adjustment range (2.5V-8V 0.5V) Operation : Turn the knob clockwise to increase the voltage, counterclockwise to decrease the pressure, and turn the knob fully counterclockwise to close. Product name: USB voltage regulating module Input voltage: 5V Output voltage: 2.5V-8V0.5V Output power: upper limit 7 watts Input port: USB TYPE-C female port Output port: USB-A female port Colour:Black Material:PLA Package Contents: 1 x USB Speed Controller 1 x USB A to C cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.