Please be sure to remove the red transport screws on the bottom, before use. If the screw is not removed, the machine would be broken after several shocks. The screw is aim to fix the machine during transportation. It must be removed before you power on the machine! We are expecting Good co-operation with you and hope to see you again!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.