IV. Product Function Operation Method 1. Power on/off: long 2 seconds/turn on, long 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: the button 3 times to turn on the ambient light;6. Tail light: Single-click the instrument button to turn on the headlight/taillight, then click the instrument button again, the headlight/taillight goes out, and the brake taillight flashes. 7. Miles: the button 4 times to switch kilometers 8. Riding mode: 1. Default zero start mode, 5 times to switch zero/non-zero start. 9. mode: Hall electronic linear brake. 10. Clear Bluetooth: the button 8 times to hear a long beep (change the phone to operate this function). 11. APP functions: 1. Turn on/off cruise control. 2. Kilometer/mileage switch. 3. Zero/non-zero start mode. 4. Fault detection. 5. Current mileage, total mileage. 6. Turn on/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: & Silver Material:Metal + Plastic Package Contents: 1 * Controller 1 * Dashboard 1 * Accelerator 1 * Headlight 1 * Taillight 1 * connecting wire 1 * brake handle 1 * display cover 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.