This is a motor break-in machine with an integrated motor stand for Mini 4WD cars. It can be used with both single-shaft and double-shaft motors. ・Supports USB-C and USB-PD. By connecting to a PD power supply, it provides stable performance even when using break-in methods that apply a load or with high-voltage break-in. For low-voltage break-in, it can operate with a 5V/2.4A USB power supply, but a PD power supply is recommended. ・Voltage and maximum current can be adjusted. The voltage can be set from 0.6V to 30V, but usage up to around 9V is assumed. Break-in methods that burn the copper brushes with high voltage are also possible, but are not recommended as they deviate from the manufacturer's intended use. The maximum current depends on the USB adapter used, but when connected to PD, it can stably output a maximum of 4.1A. ・Equipped with a forward/reverse switch. The "F" marked side is for front-motor cars, and the "R/C" marked side is for rear-motor and center-motor cars' forward rotation. ・The external output port is always red for positive and black for negative, regardless of the switch position. ・Equipped with an auto-cut timer function. Can be set in the range of 1 minute to 99 hours and 99 minutes. ・The bottle holder can hold bottles up to approximately 22mm in diameter. ・The body is made of carbon-reinforced resin, and the contacts use copper shafts with high conductivity. Also, the contacts are pressed by springs, so the contact pressure is stable. ・An instruction manual will be enclosed on paper with a QR code printed on it. Please download it from the Google Drive link. ※Adapter, USB cable, motor, and oil are not included. ※Protection circuits for short circuits and overloads depend on the USB adapter. For safety, please use a USB adapter with a PSE mark. ※This equipment is a product made by an individual. In selling, we have conducted overload tests and heating tests during long-term operation, and have taken the utmost care for safety, but we cannot guarantee the same level of safety and reliability as manufacturer-made industrial products. Please use it where you can see it. Also, we are not responsible for any damages related to the use of this equipment under any circumstances. Thank you for your understanding. ※Due to being a 3D-printed product, there may be small scratches or layer marks that occurred during finishing.