Feature: 1. Controller Performance: The 36V 48V 250W 350W controller casing is made of metal with groove design, which can protect internal circuits and avoid thermal overload due to its excellent heat dissipation function. 2. S800 Display Performance: The electric bike S800 display adopts ABS material, which is lightweight, sturdy, and durable, with fine workmanship, good toughness and waterproof performance, providing better protection for internal circuits, making it more durable. 3. Multiple Functions S800 Display: When riding a bicycle, this electric bicycle S800 display will display many useful data on your bike, such as switch buttons, light switches, battery level display, and other functions. A display screen can keep you informed of the situation at all times. 4. Main Applications: Electric bike controller kit is suitable for 250W and 350W motors, suitable for DIY electric bicycle, electric scooter, folding bicycle, etc. The lithium battery modification of bicycles greatly enhances cycling pleasure, making it suitable for cyclists who enjoy challenges. 5. What You Get: The bicycle lithium battery modification kit includes for JN controller, S800 display, thumb throttle, power assist sensor wiring, power assist sensor sensor magnetic disc. Specification: Item Type: 36V 48V 250W 350W Brushless Motor Controller Material: ABS, Rubber, Aluminum Alloy, Metal Weight: Approx. 825g / 29.1oz Controller Current: 15A Controller Voltage: DC 36V 48V Controller Speed Setting: 1.1-4.2V Braking: Input Low Level Controller Size: Approx. 85x50x30mm / 3.3x2.0x1.2in Applicable: Suitable For Use With 250W, 350W Motor, Matching Communication Protocol For JN Products (Common Communication Protocol No.2). Package List: 1 x Controller 1 x Display2 x Brake Handle 1 x Power Assist Sensor1 x Power Assist Sensor Magnetic Disc 1 x Thumb Throttle1 x Accessory2 x Manual