Features1Metal Controller: The controller shell uses high quality metal with groove design, which has a good heat dissipation function and can protect the internal circuit to avoid thermal overload. 2Control And Protection Function: The single chip microcomputer is used as the main controller control chip to control and protect the motor and battery of the electric bicycle, and improve their reliability and service life. 3Twist Throttle Grips: The thumb throttle handle has a power lock display function, which is convenient and practical, and is suitable for 22.5mm / 0.9in handlebars. 4Sensitive Control: The wire and interface of the controller are durable, ensuring low failure rate after long term use. The controller can provide stable speed and sensitive braking and direction change control. 5Easy To Install: The electric motor controller kit is very convenient to use, just connect the sockets of the brake lever and the throttle handle to the corresponding interface of the controller to realize the function.SpecificationItem Type: Brush Motor Controller KitMaterial: Aluminium AlloyProduct Color: As Pictures ShownController Box Size: Approx. 9x6.5x3.3cm / 3.5x2.6x1.3inProduct Weight: Approx. 908g / 32.0ozPower: 500WCurrent Limit: 28APackage List1 x Brush Controller1 x Pair ofTwistThrottle Grips1 x Pair of Brake Levers1 x Manual