✨♦Big Sale Mini 4WD Motor Break-in Machine This product is a device that connects to a USB adapter (output 2A) and allows you to adjust the voltage by turning a knob. The input voltage is DC5V, and the output voltage can be adjusted in the range of approximately 0.6V to 25.8V. The LED lights up blue. Please consider the displayed voltage as a guideline only, and confirm the actual motor speed, etc., using a smartphone app or similar, before use. It supports high-voltage break-in operation when using copper brushes, but be sure to connect the motor first at a low voltage and then manually adjust the knob slowly. The product is a new, unused item, but a power-on test has been performed once to check its operation. After receiving the product, please first check its operation and confirm that there are no problems before giving a rating. We cannot respond to defects, etc., after the rating is completed, so please be aware of this. 【Important】 The color of the alligator clip cords will be shipped randomly. Color selection is not possible, so please understand.