Features1Due to the good heat dissipation function, the internal circuit can be protected to avoid thermal overload. 2Easy to install and remove, without any difficult requirements even though you use it for the first time. 3The shell is made of highquality metal with groove design, durable enough for long time use. 4Provide stable speed and sensitive control of braking and direction changes. 51000W brushless controller, LCD display, suitable for 22.5mm / 0.9in handlebars.SpecificationItem Type: ControllerMaterial: Aluminum AlloyController Box Size: Approx. 18 x 8.5 x 4.5cm / 7.1 x 3.3 x 1.8inWeight: Approx. 880g / 31ozPower: 1000WCurrent Limit: 38AThread Color Definition:Red Power InputYellow Switch OutputBlue Signal TransmissionGreen Signal ReceptionBlack Negative Twist HandlebarPackage List1 x Controller1 x BikeDisplaywithThumbThrottle1 x Manual