26 Wheel with Rear Motor. 36VW Rear Motor, Installation Width=138mm, Diameter=134mm. Gearshift: Fit for Cassette Freewheel(8S/9S/10S). 12G spokes with double wall wheel. Cable:70cm W/O connector(quick release waterproof connector). Low voltage protection: 30V, Rated current: 9A, Max. Waterproof connecters: motor, battery, PAS sensor, and 4 in 1 cable. Controller size: LWH=9.55.02.8cm. 3.5 LCD screen display with backlight, Cable: 31.5cm W/O connector. 5 Assist levels, and 6km/h traction with holding Down Button. Wuxing Brand, with immediate interruption of the power. Cable:30cm W/O connector. 4 in 1 waterproof connectors(quick release). Cable:150cm W/O connectors. To connect battery and controller. 36V Rear Motor, Installation Width=138mm, Diameter=136mm. Gearshift: Fit for Screwed Freewheel(6S/7S/8S/9S). Motor Cable:70cm W/O connector(quick release waterproof connector). Low voltage protection: 31V, Rated current: 9A, Max. PAS Senso r(Left installation). Cable:52cm W/O connector. Dual hall sensor, 12 signals output. Wuxing Brand, Thumb throttle. Waterproof Connection cable(4 in 1). If you want to return our battery back, please pay attention to the following points to avoid short circuit caused by improper operation. If the battery has a switch, be sure to turn off the power switch. Please keep the positive and negative poles of the battery insulated just like the battery you received. Please use foam or other materials to fix the battery to avoid the battery shake in the carton.