Features1Bicycle Lithium Modification Controller Kit; Includes 17A three mode controller and EN06 panel. Suitable for DIY modification to meet your needs. 2High Grade Material: The controller housing is made of metal with a fluted design, which protects the internal circuit due to its nice heat dissipation function, thus avoiding thermal overload. The panel is made of ABS material, light, strong and durable, fine workmanship, with high toughness and waterproof performance, providing better protection for the internal circuit, making it more durable. 3Multiple Functional Panel: When riding a bike, the product will display many useful data on your bike, such as switch buttons, light switch, battery level display and other functions, a display can keep you abreast of the situation 4 Accessories: Panel mounting diameter 22.2mm, suitable for electric bicycles, electric scooters and other accessories. 517A Three Mode Controller Kit: Suitable for 250W350W motor; DIY electric bicycle, electric scooter, folding bike, etc. Easy to maintain, the bike lithium electric modification greatly improves the fun of riding, suitable for cyclists who like a challenge.SpecificationItem Type:PanelSpeedControllerKitWeight: 377g/13.3ozMaterial: ABS, rubber, aluminum alloy, metalApplication: Suitable for 250W-350W motorController Size: 80 x 50 x 30mm/3.1 x 2 x 1.2inMaximum Current: 171AController Voltage: DC 36V 48VController Speed Setting: 1.1-4.2VBrake: Input low levelPackage List1 x Controller1 x Panel2 x Instructions