Features1The controller shell is made of highquality metal alloy and has groove design, durable and very sturdy. 2It has good heat dissipation capacity, which can properly protect the internal circuits and avoid thermal overload. 3The brushless motor controller provides stable speed control as well as sensitive control of braking and direction change. 4Installed in the middle of the handlebar, handlebar diameter range: 22.2/25.4/28.6mm 5Equipped with an adapter ring, the maximum current of the USB charging port is 0.3A, which can charge mobile phones, etc.SpecificationItem Type: Electric Scooter Controller and LCD Meter SetController Box Size: Approx. 11.4x8.5x4.5cm/4.5x3.3x1.8inMaterial: Aluminum AlloyPower: 450WCurrent-limiting: 23AMeaning of the Wire Color:1. Red: Positive Power2. Yellow: Gate Lock3. Blue: Signal Transmission4. Green: Signal Receive5. Black: Negative Power6. Brown: Positive Car Light7. White: Negative Car LightWeight: Approx. 780g/1.7lbPackage List1 x LCD Display1 x Controller1 x Instruction