1. ON/OFF function of power supply, it will automatically shut down after standby for 5 minutes; 2. Four-bit intelligent power display can be a true reflection of the state of battery charge to guarantee the riding distance; 3. High, middle and low gears of imitation torque boost of switch gears and gear indicator display, with gear memory function, power on can automatically recover the gear state during power off; 4 .6Km/h boost function, and the boost light is blinking during boost, it can be used by the rider during driving a vehicle, and the vehicle driving will be easy; 5. Under-voltage indication function, when the battery is in under-voltage, the under-voltage indicator flashes; 6.The adoption of five- line of digital communication is with a self-setting function of versatile parameters, users can adjust the settings such as motor parameters, velocity parameters, speed parameter according to different models; 7. The instrument is with good interchangeability, and different instruments can directly exchange with each other and copy the data parameters; 8. The optional power supply voltage is 24V, 36V and 48V; colour:Black Material:plastic Package Contents: 1 * Display Only the above package content, other products are not included. Note: Light 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.