Safe & Environmentally-Friendly: Brake levers for cutting off the power and braking when riding, can ensure riding safety; CE certificated for quality and safety assurance; battery powered design for environmental protection. Motor Type:Brushless Gearless hub motor. Wheel Bottom Bracket:Front:100mm Gear:135mm. Waterproof grade (IP Grade):IP65. Package Size:26 inch: 595924cm.1 26'' 36v 500w Rear Wheel Conversion kit. 1:We provide 30 days return/replacement. If you need to return, please.