Features of Electric Bicycle Conversion Kit: Kit for converting normal bicycle into electric bicycle,easily assembled Front Hub Brushless Motors available: 200W, 250W, 350W, 500W (optional) CNC sidewall Aluminum Rims available: 20”, 26", 28" (optional) Batteries(10AH li-ion) available: 24V or 36V (optional) Max Speed: 25km/h(EU standard) or faster max speed (optional) PAS Sensor (convert bicycle intoPedelec as EU required) Smart controller: totally match the motor Cut-Off Power brake lever Power indicator Throttle & handle Battery Charger: input voltage range from AC 100V-240V Packing: Carton + Full-enclosed foam (protectall partswell) Carton size: 70*25*70cm N.W./G.W : about 9.8kg/12.5kg