Features1Quality Assurance: Strict quality control standards, good stability and performance, high safety factor, can be used with peace of mind. 2Durable Material: The wire and interface are durable, ensuring low failure rate for long term use, more efficient and more energy saving. 3Practical Parts: Brushless controller is a good accessory for electric bicycles, scooters, etc., bringing you more comfortable riding experience. 4Good Heat Dissipation Function: Controller shell uses metal material, with groove design, which can protect the internal circuit and avoid thermal overload. 5Dual Mode Controller: Intelligently identify the state of the motor hall, switch the working mode, the hall is normal, there is a hall operation, and when it is damaged, it switches to no hall operation.SpecificationItem Type: Electric Bicycle Brushless Motor ControllerColor: As Pictures ShownMaterial: Aluminum AlloyVoltage: 72/84VPower: 500WCurrent Limit: 28ALow Voltage: 63/73VWeight: Approx.654g/23.1ozController Box Size: Approx. 15x8.5x4.5cm/5.9x3.3x1.8inPackage List1 x Controller1 x Manual