Referral Letters Coming Soon. Any Questions about Our products? If you have any questions about any of our devices or how to use them, get in touch with us by this contact form on the right or call us with the information below: Customer Service: 1.877.885.1612Sales: 216.299.1249Email: sales@devonmd.com Corporate Headquarters: Devon MD LLC. 700 American Avenue, Suite 100 King of Prussia, PA 19406 China Headquarters: Devon Medical Products (Jiangsu) Room 2107 Hitech Plaza, No. 488 Wuning S Road Shanghai, China 200042 Name Email Phone Number Message Send