Features1Cotroller: The controller is a sine wave three mode controller matching with Hall and no Hall brushless motor with self learning function for 36V1000W 36V750W 48V1000W 48V750W with Hall and no Hall brushless motor. 2Prime Metal Shell: The controller shell is made of metal with groove design, which can protect the internal circuitry due to good heat dissipation function, thus avoiding thermal overload. 3Display: The display is made of ABS material, which is light, strong and durable, with fine workmanship, good toughness and waterproof performance, providing better protection for the internal circuitry and making it more durable. 4Kit Content: This bicycle lithium conversion kit contains brushless motor controller, a display, power assist sensor and thumb throttle, which can improve the performance of electric bicycle and perform well. 5Main Uses: DIY electric bikes, electric scooters, folding bikes, etc.; easy to maintain, bike lithium conversion greatly improves the fun of riding, suitable for cyclists who like challenges.SpecificationItem Type: Electric Bicycle Lithium Battery Conversion KitWeight: 788g / 27.80ozMaterial: Aluminum alloy, ABS, PlasticCurrent: 301APackage List1 x Controller1 x Display1 x Display Manual1 x Thumb Throttle1 x Waterproof Cable1 x Power Assist Sensor1 x Power Assist Magnet Ring1 x Instruction Manual