The response time is generally within 24 hours, thank you!
For product support,
                        Please email us at cklauus01@gmail.com and include your Amazon order number, or contact our customer support directly through Amazon. Thank you!

Business  contact: Luckin  Lai
Address:1st Building, Fulian Industrial Area, Longhua Town, Longhua Dist, Shenzhen, China. 518109
TEL: +86 0755-83162352
         +86 15999608676
FAX: +86 755-27525671
E-mail: luckinlai@foxmail.com  
Skype: luckinlai@hotmail.com
Website: http://www.ckl.net.cn