Features1Controller Housing: The controller housing is made of metal with a grooved design, which protects the internal circuits from thermal overload due to good heat dissipation. 2S866 Display: The S866 display is made of ABS material, which is light, strong and durable, has fine workmanship, good toughness and waterproof performance, providing better protection for the internal circuit. 3Multifunctional S866 Display: The S866 display has a variety of functions, when riding a bike, the product will display many useful data on your bike, such as switch buttons, light switches, battery level display and other functions, a display can keep you informed of the situation. 4Scope of Applicatipn: 25A controller small kit is suitable for 750W motor, mainly used for DIY electric bikes, electric scooters, folding bikes, etc. Easy to maintain. The lithium battery modification of the bike greatly improves the riding fun and is suitable for cyclists who like challenges. 5Package List: Includes controller; S866 display, accelerator dial; power assist sensor wiring; power assist sensor sheet, headlight, tail light, horn light button, and four in one connection cable. There are many kinds of sets, suitable for your own DIY modification, to meet all needs.SpecificationItem Type:36V48V25AControllerS866Display KitMaterial: ABS, Rubber, Aluminum Alloy, MetalColor: As Pictures ShownWeight: Approx. 867g / 30.6ozApplication: Applicable to 750W Motor, Matching Communication Protocol is UART (commonly known as No. 2 communication protocol)Controller Size: Approx. 120x53x33mm / 4.7x2.1x1.3inController Rated Voltage: DC 36V, 48VController Current: 25AController Speed Setting: 1.1-4.2VSupercharger: 1:5Applicable Motor Power: 750WBrake: Input Low LevelController Line Definition:1. Black Single Wire: Motor (9pin)2. Black and Red Single Wire: 2 Battery Power3. Black, Yellow and Brown Wire: Power Assist Sensor (3pin)4. Black, White and Red Wire: Throttle (3pin)5. Black and Yellow Wire: 2 Brake (2pin)6. Black and Red Wire: Headlight (2pin)7. Black and Red Wire: Rearlight (2pin)8. Multi Color Wire: Display (5pin)Package List1 x Controller1 x S866 Display (Including Bracket, Line)1 x Throttle Dial (Wire Included)1 x 8C Power Assist Sensor Wiring1 x 8C Power Assist Sensor Sheet1 x Headlight (Wire Included)1 x Tail Light1 x Tail Light Wire1 x Horn Light Button (Wire Included)1 x Four in One Cable2 x Manual