Suitable for DIY modification and meet all needs. Metal Controller Shell: The controller shell is made of premium metal with groove design. Due to its good heat dissipation function, it can protect the internal circuit to avoid thermal overload. ABS Meter: The meter is made of premium ABS material, which is light, durable, fine and has good toughness and waterproof performance, providing better protection for the internal circuit and making it more durable. Multiple Functions: When riding a bike, the product will display many useful data on your bike, such as switch buttons, light switches, battery power display and other functions. A display screen can let you keep track of the situation. Applicable To: 17A controller kit is applicable to 250W to 350W gear motor; Main applications: DIY electric bicycle, electric scooter, folding bike, etc; It is easy to maintain. The lithium battery modification of bicycles greatly improves the fun of riding, and is suitable for cyclists who like challenges. Item Type: Electric Bicycle Conversion Kit Material: ABS, rubber, aluminum alloy, metal Gross Weight: 1164g/41.1oz Applicable: 250W to 350W gear motor Controller Size: 90x50x30mm/3.5x2x1.2in Controller Current: 17A Controller Voltage: DC 36V 48V Controller Speed Setting: 1.1-4.2V Braking: Input low level. 1 x Throttle Dial. 1 x Front Lamp. 1 x Tail Light. 2 x Brake Handle. 1 x Main Control Switch.