Feature:1. Due to the good heat dissipation function, the internal circuit can be protected to avoid thermal overload.2. Easy to install and remove, without any professional requirements even though you are an amateur.3. Shell is made of high‑quality metal with design, durable enough for long time use.4. 1500W brushless controller, LCD display, suitable for 22.5mm / 0.9in handlebars.5. It can provide stable speed and sensitive control of braking and direction changes.How to Use:Connect the handlebar socket to the handlebar interface of the controller to realize the function.Specification:Item Type: ControllerMaterial: Aluminum AlloyController Box Size: Approx. 17 x 10.5 x 6cm / 6.7 x 4.1 x 2.4inWeight: Approx. 1100g / 38.8ozVoltage: 36V/48V UniversalPower: 1500WCurrent Limit: 50AThread Color Definition:①Red Power Input②Yellow Switch Output③Blue Signal Transmission④Green Signal Reception⑤Black Negative Handlebar Package List:1 x Controller1 x Bike Display with Thumb Throttle1 x Manual