Supported Models: Compatible with 1S, Pro, Pro 2. For M365 scooter installation, the Bluetooth board must be replaced with our version and the motor upgraded to a higher specification. Attention: A. Confirm your scooter model is 1S/Pro/Pro 2 and is an original unit. Copies may not be compatible. To use this controller, replace the Bluetooth board and controller with our compatible versions. B. This product modifies the scooter's software to adjust speed. If the original motor is 250W, performance may be limited, as the motor restricts maximum speed. Achieving speeds up to 38km/h may require upgrading to a 350W or higher motor. C. This product is intended for private use only. Modification may affect software settings, potentially impacting insurance coverage. Users assume all risks. Manufacturer and seller are not liable for any damage to scooters or other consequences. Use at your own risk. Features: 1. Two speed modes: (1) Low speed mode – up to 20km/h (factory default). (2) High speed mode – up to 38km/h. Installation Steps: 1. Turn off the scooter. 2. Remove the four screws located under the display on the stem. Keep screws for reassembly. 3. Open the stem cover. Locate the display and connected wire with a middle connector. Disconnect it. 4. Insert the controller between the display and wire, ensuring proper alignment and avoiding pin damage. 5. Place the controller inside the stem and reattach the four screws. 6. Press and hold the Bluetooth board power button to turn on the scooter. 7. Press the brake three times, then press the throttle three times. The display will show 38, indicating firmware update in progress. Do not operate during this process. Wait until the display shows 0, indicating completion. Turn off the scooter, restart, and test the updated speed. Color: Black Material: Plastic Package Contents: 1 x Scooter Speed Controller Note: Other items not included. Note: Lighting and screen differences may cause slight color variations. Measurement tolerance: ±1-3cm.