Hi pcwineguy64,
Thank you for your post!
Unfortunately there is no extension available for the BFST controller.
Aside from that we don't recommend that people wear our products while they sleep. You can do a twenty minute treatment prior to going to bed, which will stimulate your blood flow for upwards of four hours. Then when you wake up, do a treatment in the morning to alleviate any stiffness in your foot.
If you have any more questions, please feel free to call us toll free at 1-877-661-5239. We are available 7 days a week until midnight EST.
Thank you for your question, I hope we were helpful.
Customer Service