Features:  - Display adopts fine quality materials, lightweight, rainproof, sturdy and practical.  - LCD display can clearly show the state and data, backlight enables you to see scree clearly in dim environment, buttons for quick operation, easy to use.  - The controller is brushless type, working more fast, silently and sensitive to the state of electric bike.  - Easy to install and use, comes with mount for LCD display.    Specifications:  Material: Plastics + LCD + Metal;  Voltage: 60V;  Undervoltage: 51V;  Current: 45 1A;    Package included:  1 x LCD Display;  1 x Front Controller;  1 x Rear Controller;  1 x Connecting Lines;    Front Controller:   1. Power cable;  2. Front and rear controller connection cable;  3. Single and dual drive switch;  4. Learning cable (two connectors);  5. Motor cable (. three thick wires plus a white Hall connector);   Rear Controller:  1. Key ignition switch;  2 Instrument (two connectors);  3. Learning line (two connectors);  4. Brake disconnection line;  5. Front and rear controller connection line   6. The speed limit wire is connected to eco;  7. The motor wire (three thick wires and a white Hall connector);  8. The battery power wire 9. The brake tail light;  10. The power wire is controlled by the key.