The circulation booster is a plantar stimulating device that is widely promoted as helping those with poor circulation. It is claimed that it does this by stimulating muscles which activate the venous return muscles pump. There are a lot of testimonials supporting the circulation booster, but no unbiased outcome studies.

Resources:

http://www.podiatry-arena.com/podiatry-forum/showthread.php?t=37534

http://podiatric.blogspot.com/2011/09/does-circulation-booster-work-at.html