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 portBuilt-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 moduleInput voltage: 5VOutput voltage: 2.5V-8V0.5VOutput power: upper limit 7 wattsInput port: USB TYPE-C female portOutput port: USB-A female portColour:BlackMaterial:PLAPackage Contents:1 x USB Speed Controller1 x USB A to C cableOnly 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.