Note: While Connecting the Controller to the Wires, Please Make Sure That You Connect the Right Colors to the Controller. Otherwise, the Controller May Be Broken. 28 48v 1000w Ebike Conversion Kit for Rear Wheel 28 inch. Spokes and Aluminum Circle 4. 48v 1000w Controller 5. Twist Throttle with 5 Star 8. Connectors and Fuse 10. We Use the Brake Cable with a Power Cord, Our Clients Can Use Disc Brakes and V brakes but Can Not Use Hydraulic Brake. About the Battery: the Size of Amps Determines the Amount of Battery Storage, the Battery Storage Determines the Length of Using Time, the Battery Must Match the Interface of Our Controller. When Installing, Make Sure That the Wiring Is Not Reversed. Otherwise, It May Damage the Product.