Features： 1、Controller: The controller is a sine wave three mode controller, matching with hall or no hall brushless motor with self learning function. 2、Applicable Motors: Applicable 24V 250W, 24V 350W, 36V 250W, 36V 350W, 48V 250W, 48V 350W with hall or without hall brushless motor. 3、Controller Shell: Made of metal with a grooved design, it protects the internal circuitry from thermal overload due to good heat dissipation. 4、Display: Made of ABS material, lightweight, sturdy and durable, fine workmanship, good toughness and waterproof performance, providing better protection for the internal circuitry and making it more durable. 5、Main Use: DIY electric bike, electric scooter, folding bike, etc.; Easy to maintain, lithium bike modification greatly improves the riding fun, suitable for cyclists who like challenges. Specification： Item Type: Electric Bicycle Lithium Conversion Kit Weight: 622g / 21.94oz Material: Aluminum Alloy, ABS Plastic Controller Voltage: DC24, 36, 48V Current: 17±1A Package List： 1 x Controller 1 x Display 1 x Display Manual 1 x Thumb Throttle 1 x Power Assist Sensor 1 x Power Assist Magnetic Ring 1 x Instruction Manual