Operate with little noise and have a long lifespan. The complete kit includes: motorized wheel, motor controller, PAS sensor (Pedal assist sensor), speed throttle, brake handle and etc. Fuse available to ensure motor is protected all the time. 2-model controller guarantees you can ride your motorized bike even when the signal source (Hall) is disabled. Speed throttle with 3 LEDs indicator lights (Thumb throttle for 1000w Kit, hand throttle for 500w kit). PAS sensor (Pedal assist sensor) and speed throttle, you can choose either of them to control the speed according to the local policy. The control box offers a function to limit the hightest speed of 1000w motorized wheel to 25km/h if necessary. Disc brake mounting postion. For 500w rear wheel and 1000w front/rear wheel. Disc brake not included. 500w front wheel has no disc brake mounting position. For 500w/1000w rear wheel. Sturdy and will last for years to come. Reinforced 32mm rim and 40mm tire. Wheel size: 26″x1.75″. For 36V/500W product, the system requires a 36Volt electrokinetic cell battery Li, lead-acid, NiMH battery etc. With a nominal capacity not less than 12Ah. Motor rotating speed: 300rpm. Max speed: 4548km/h (can be limited to 25km/h with the control box function). For 48V/1000W product, the system requires a 48Volt electrokinetic cell battery Li, lead-acid, NiMH battery etc. With a nominal capacity not less than 17Ah. Please make sure the axle dimension is compatible with your bike before placing your order. 1x 26” wheel with brushless hub motor. 1x Electric control box. 1x PAS sensor (Pedal assist sensor). Connecting wires and fuse. 1x Battery carrying bag. 1x Elastic rope (color will pick at random).