Features1Due to the good heat dissipation function, the internal circuit can be protected to avoid thermal overload. 2Shell is made of highquality metal with groove design, durable enough for long time use. 3Easy to install, without any difficult requirements even though you use it for the first time. 4500W brushless controller, LCD display, suitable for 22.5mm / 0.9in handlebars. 5Provide stable speed and sensitive control of braking and direction changes.SpecificationItem Type: ControllerMaterial: Aluminum AlloyController Box Size: Approx. 15 x 8.5 x 4.5cm / 5.9 x 3.3 x 1.8inWeight: Approx. 770g / 27.2ozPower: 500WCurrent Limit: 28AThread Color Definition:Red Power InputYellow Switch OutputBlue Signal TransmissionGreen Signal ReceptionBlack NegativeTwistHandlebarPackage List1 x Controller1 xBike ThumbThrottle1 x Manual