Features： 1、Notched Design: The controller shell is made of metal with a notched design, which protects the internal circuitry due to great heat dissipation, thus avoiding thermal overload. 2、Waterproof Display Panel: The display cover is made of ABS material, light and strong, with great toughness and waterproof performance, to provide better protection for the internal circuit, so that it is more durable. 3、Main Uses: 15A controller kit is suitable for 250W and 350W motor, for DIY electric bike, electric scooter, folding bike, etc. Easy to maintain, the bike conversion kit greatly improves the fun of riding, suitable for cyclists who like a challenge. 4、Multiple Display Functions: When riding a bike, the panel will display a lot of useful data on your bike, such as the switch button, light switch, battery level display and other functions, a display screen can keep you in touch with the situation. 5、For DIY: This conversion set includes 1 controller, 1 display panel, 2 brake handles, 1 booster, 1 power assisted magnetic disc, 1 thumb pick, 1 accessory and 2 specifications to meet your different needs. Specification： Item Type: Electric Bike Controller Kit Material: ABS, rubber, aluminum alloy, metal Weight: Approx. 835g/29.5oz Application: Applicable to the 250W 350W motor matching communication protocol for JN products (communication protocol No.2) Controller Size: Approx. 85x50x30mm/3.3x2.0x1.2in Controller Current: 15A Controller Voltage: DC 36V 48V Controller Speed Setting: 1.1 to 4.2V Brake: Input low level Package List： 1 x Controller 1 x Display Panel 2 x Brake Handle 1 x Booster 1 x Power Assisted Magnetic Disc 1 x Thumb Pick 1 x Accessory 2 x Specification