Features1ELECTRIC BIKE PANEL KIT: Electric bike panel kit contains 17A controller, V889 meter, booster sensor wiring, booster sensor booster piece, headlight, taillight, brake handle, etc. Kit variety, suitable for their own DIY modification. 2GOOD HEAT DISSIPATION: Electric bicycle controller kit is safe to use. The controller housing is made of metal with groove design, which has good heat dissipation function and can preserve the internal circuit, thus avoiding thermal overload. 3V889 METER: Electric bicycle conversion motor kit is designed to meet your different needs. The V889 meter has a variety of functions that display many useful data on the bike while riding, such as on/off buttons, light switches, battery level display, etc. 4FINE WORKMANSHIP: The meter is made of ABS material, which is lightweight, sturdy and durable, with workmanship, good toughness and waterproof performance, providing better protection for the internal circuitry. 5SCOPE OF APPLICATION: Electric bike controller kit is suitable for 250W350W geared motor, suitable for DIY electric bicycle, electric bike, electric scooter, folding bike, etc. Easy to maintain, improves riding fun, suitable for cyclists who like challenges.SpecificationItem Type: Electric Bike Controller KitMaterial: ABS, Rubber, Aluminum, MetalApplication: For 250W-350W Gear Motor (Matching The Communication Protocol For The Use of for Jian Nuo's Products, Commonly Known As The Second Communication Protocol)Controller Size: Approx. 90x50x30mm / 3.5x2.0x1.2inController Current: 17AController Voltage: DC 36V 48VController Speed Setting: 1.1-4.2VBrake: Input Low LevelPackage List1 x V889 Meter1 x Controller1 x Booster Sensor Wiring1 x Boost Sensor Booster Piece1 x Wire1 x Headlight1 x Tail Light2 x Brake Handle1 x Master Control Switch1 x Controller Package2 x Instruction Manual