This is the cover and AC adapter for an OMRON massage cushion. The compatible main unit is the type that plugs into an outlet, not rechargeable. The massage balls have a built-in heater, and you can massage with or without the heater on. I'm selling it because I haven't used it much. Mercari prohibits the sale of the massage machine itself, so this listing is actually only for the cover and AC adapter. The cover is removable and washable. I will ship it after washing it. - Brand: OMRON - Material: 100% Polyester - Features: Massage Cushion - Power Source: Includes AC Adapter Thank you for viewing.