Warranty Aggrement: Motor Kits,warranty time 12 month  except phycial damage and wrong operation. Battery,warranty time 12 month  except phycial damage and wrong operation. Accessories,60  days  except phycial damage and wrong operation.   Return & Refund: It is our pleasure to see customers have fun with our products, if you decide to return the items within 15 days after receipt,we will refund you, the return items must be in original conditions. Feedback: Your satisfaction and positive feedback is very important for us, it will be very kind  of you to leave us 5 stares feedback, if you have any problems, feel free to ask us, we  will do our best to give you service.