IV. Product Function Operation Method 1. Power on or off: long press 2 seconds or turn on, long press for 2 seconds to turn off. 2. Gear: Double-click to change gears 3. Speed: Gear 1 10km/h, the "ECO" on the screen lights up, 2 20km/h, the "D" on the screen lights up, 3 30km/h, the "S" on the screen lights up (with memory function, default to the gear used before the last shutdown).4. Instrument headlight: Single-click the button to turn on the light 5. Ambient light: Press the button 3 times to turn on the ambient light 6. Tail light: Single-click the instrument button to turn on the headlight or taillight, then click the instrument button again, the headlight or taillight goes out, and the brake taillight flashes. 7. Miles: Press the button 4 times to switch kilometers 8. Riding mode: 1. Default zero start mode, press 5 times to switch zero or non-zero start. 9. mode: Hall electronic linear brake. 10. Clear Bluetooth: Press the button 8 times to hear a long beep (change the phone to operate this function). 11. APP functions: 1. Turn on or off cruise control. 2. Kilometer or mileage switch. 3. Zero or non-zero start mode. 4. Fault detection. 5. Current mileage, total mileage. 6. Turn on or off headlights. 7. Lock the car to prevent theft. 8. Cycling map (mobile phone needs to be positioned) 9. Three gear speeds can be set. 12. Automatic shutdown after 5 minutes of no operation 13. Battery display 1) Voltage: below 32V, the first light flashes red 2) Voltage 32V-33.8V, the first light is always on 3) Voltage 33.8V-35.5V, the second light is always on 4) Voltage 37V-35.5V, the third light is always on 5) Voltage 37V-38.3V, the fourth light is always on 6) Voltage 38.3V, the fifth light is always on 7) Voltage is lower than 31V, plus or minus 1V, the motor stops Colour: and Silver Material:Metal and Plastic Package Contents: 1 x Controller 1 x Dashboard 1 x Accelerator 1 x Headlight 1 x Taillight 1 x connecting wire 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.