1.Data display function: with driving speed, single mileage and accumulated mileage, riding time, assist gear, battery voltage and power status, status and other riding parameters; 2. Intelligent power function: It can really reflect the battery power status and record the real time power consumption to the mileage. 3. gear adjustment function: assists gear shifting and automatic saving of multiple gears, and restores gear status when machine is started. 4. Parameter setting function: It has a number of user parameter setting functions, which can set and adjust operating modes such as motor parameters, speed measurement parameters, speed limit parameters, power parameters , power control parameters, minimum voltage controller and maximum current parameters for different models. 5. Data visualization function: User can view and clear historical driving data, check single or accumulated driving time, riding mileage, single speed and average speed. USB Charging Function: With USB charging interface, using high reliability and high stability power chip. Colour:Black Material:plastic Size:6 x 8 x 11.5CM Package Contents: 2 x Ebike-Controller Display 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.