UNIVERSAL COMPATIBILITY: The kit increases the of riding by transforming any into an electric powered version. Suitable for various types of bikes such as electric bikes, DIY electric bikes, electric scooters, and folding bikes. EFFICIENT COOLING SYSTEM: The controller features a high grade metal shell with slot design for excellent heat dissipation, preventing internal circuit overheating, ensuring your conversion kit works efficiently and lasts longer. MULTIFUNCTIONAL DISPLAY: The display shows useful data of your while riding, allowing you to stay informed of various aspects of your at all times, providing you with a convenient user experience. STURDY AND WATER RESISTANT: The display is made from lightweight and high grade ABS plastic known for its durability, toughness, and excellent water resistant performance for better guard of internal circuits. HIGH PERFORMANCE HUB: The use of aluminum alloy hub effectively improves the quality of hub with features like lightweight, high grade, comfort, strong load bearing capacity, low noise, providing you maximum enjoyment of riding. 135-142mm / 5.31-5.59in Speed: 464-537RPM Brake: Disc Brake. 1 x Motor 1 x Controller 1 x Controller Bag 1 x Display 1 x Display User Manual 1 x Throttle 2 x Half Throttle 1 x Throttle Clamp 1 x Assist Sensor 1 x Pair of Brake Lever 1 x Wrapping Film 5 x Ties 1 x Junction Box 2 x Screw 6 x Nut 1 x Instruction Manual. We will reply your message within 48 hours. If you do not receive our reply within 48 hours, pls. Post a message again because sometimes our message system may block some emails. If you are satisfied with our service, pls. Our aim is to provide Level Customer Service, your recognition will encourage us greatly and serve you better. We strive to keep all our customers satisfy. We will do our up most to exceed your expectations in customer service, communication and dispatching of your orders.