With Instruction: The instruction booklet is included, which will provide great help for installation. Great Performance: With intelligent phase recognition and adjustable brake, the brushless speed controller is functional. Electric Scooter Adapter: Suitable for electric scooter, electric bicycles, etc, with non-slip handle design, safe to use. Perfect Spares: The multifunctional LED turning handle can well display electric quantity, speed and gear, with strong dissipation. Premium Material: Made of premium quality materials, the motor Regulator is sturdy and durable so as to provide long time service.