Dr. Ho's Circulation Promoter is scientifically proven to improve blood circulation in your lower legs, easing swollen feet and ankles and reducing aches and pains. It combines gentle, safe TENS therapy with Electrical Muscle Stimulation (EMS) and Pulse Massage to stimulate nerves and massage muscles. This is drug-free, non-invasive pain relief that works. Includes 12 modes, an automatic timer and remote control. Also includes 4 TENS body pads for use elsewhere on the body. Uses 2 AAA batteries (not included). 16-3/4"L x 16-1/4"W x 2-3/4"H.