1. Nineteen-segment LED speed indicater,showing speed 0-40km/h 2. 6Km/h boost function, and the boost light is blinking during boost, it can be used by the during driving a vehicle, and the vehicle driving will be easy; 3. 1-5 PAS level+Four LED battery capcity showing. 4. Parameter setting and copy.interchangable with other KT LED or LCD. 5.900S waterproof:5pin Waterproof connenctor.Wire length:about 200mm with connector .Cannot connected with controller directly.Depend on a 1in4 bus cable. 1. Compare with LED900 and LED900S .900S could show current speed but the speed cannot over 41KM/H 2. ON/OFF function of power supply, it will automatically shut down after standby for 5 minutes; 3. Four-bit intelligent power display can be a true reflection of the state of battery charge to the riding distance; 4. Five-gear of high, middle and low imitated torque boost switch gears and gear indicator display, with gear memory function, power on can automatically recover the gear state during power off; 5. Under-voltage indication function, when the battery is in under-voltage, the under-voltage indicator flashes; 6. The headlight switch control function, and it can turn on and off lights, when headlights are turned on, the headlight indicator is lit; 7. 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; 8. The instrument is with good interchangeability, and different instruments can directly exchange with each other and copy the data parameters; 9. Supply voltage of 24V, 36V, 48V can be automatically identified and compatible; Material:ABS Colour:black Package Contents: 1 * Bicycle LED Display Meter 1 * Manual 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.