The Circulation Maxx Electrical Stimulator is a home-use device using EMS (Electrical Muscle Stimulation) and sometimes TENS (Transcutaneous Electrical Nerve Stimulation) to send microcurrent pulses through footpads, stimulating nerves and muscles in the feet, ankles, and legs to improve blood flow, reduce swelling, and relieve pain/tiredness from inactivity or poor circulation. It features adjustable intensity (0-99), multiple modes, often includes electrode pads for other body parts, and aims to mimic natural muscle contractions, making it popular for athletes and less active individuals.
I've actually had it for a long time and now can't remember how to use it. So, hopefully the person who buys it does.