This product can be used to convert bicycles into electric vehicles. Name:Electric Bike Conversion Kit Specifications Fit For:22-28 inch ordinary bicycle Rated Voltage:36V Rated Power:250W Flywheel Teeth:16 Rated Speed:3300 rpm Reduction Ratio:9.78 Features -Environmentally friendly material, durable and easy to operate. This kit is suitable for installation on regular bicycles of 22-28 inches. This kit is not suitable for modification in special models and variable speed models. Note -Without battery and charger!!! -Due to the manual measurement, there might be some error. This Product Can Be Used to Convert Bicycles into Electric Vehicles. Name:electric Bike Conversion Kit. Fit for:22-28 Inch Ordinary Bicycle. Rated Speed:3300 Rpm. Reduction Ratio:9.78. Environmentally Friendly Material, Durable and Easy to Operate. This Kit Is Suitable for Installation on Regular Bicycles of 22-28 Inches. This Kit Is Not Suitable for Modification in Special Models and Variable Speed Models. Without Battery and Charger!! Due to the Manual Measurement, There Might Be some Error. 1 X Motor Bracket. 1 X Electric Door Lock. 1 X Extended Shaft. 1 X Charging Interface. 2 X Speed Control Switch. 5 X Plastic Insert. 10 X Copper Plug. 2 X Steel Plate. France, Germany, spain, Italy. Feedback is very important to us. It is impossible to address issues if we do not know about them! Please keep the original box or packaging within 15days since item received. Your satisfaction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it’s non-workdays, please kindly be patient and wait till Monday.