Supported Models: Vehicle: for 1S,Pro,Pro 2, if you want to install it on M365 scooter, you need to change the Bluetooth board to our version, and the motor needs to be changed to a higher version. Attention A. Please verify the model of your scooter, whether it is the model of for 1S/Pro/, and please make sure that it is the model, if it is a copy of the model, 't that it be successful, if you want to use our governor, you can replace the Bluetooth board and controller to use our governor; B. The governor product is by changing the software version of the car, and achieve the purpose of the speed, if your motor is 250W, may not be great, because the motor limits the speed of the whole car, the motor can not take the speed of 38km/h, if you want to a lot, please replace the motor to 350W and above; C. This product is to public transportation areas, through the modification, may be your controller software version has been changed, may be your insurance be invalidated, the specific risk , please understand by yourself. This product is only suitable for private venues, the manufacturer and seller do not assume any risk, use at your own risk, do not assume any responsibility for scooters or other damage caused. 1.The governor has 2 speed states: (1)Low speed status - to 20km/h, factory default is low speed status . (2) High-speed status - to 38km/h. Steps for use 1.Turn off the scooter 2.Remove the four screws on the top of the scooter's riser, which are located under the scooter's meter, keep these four screws; 3. Open the lever, you see the meter and a wire connected, there is a plug in the middle, please unplug it; 4. Insert the governor into the middle of the meter and the wire, pay attention to the and insert it, don't break the needle inside; 5. Then put the governor into the center of the riser, and reinstall the 4 screws taken off; 6. Long the on button of the Bluetooth board to turn the scooter on; 7. the brake 3 times, then the gas pedal 3 times, the governor display the number 38, that is giving your scooter brush, at this time please do not do any operation, until the scooter's display shows 0 until, that is, brush of the maneuver, when the display shows 0, please turn off the scooter, restart again, at this time, the speed of the scooter has reached 38 yards, you can carry out the test; Color: Black Material: plastic Package Contents: 1 x Scooter Speed Increase Controller 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.