We discontinued the e-commerce function on this site. To buy TPCAST Wireless Adaptor, please look for our distributors.  
If you need any customer service, please feel free to email us via the following email address.
United States: support-us@tpcastvr.com
Europe:           support-eu@tpcastvr.com  
Download Wireless Connection Assistant and User Guide:

TPCAST Wireless Adaptor for HTC Vive

TPCAST Wireless Adaptor for Oculus Rift