Wagan IN9738 Black 12V Heated Seat Cushion (Lastest Version) We have improved heating wire technology for greater durability and safety, and expended heating window for faster heat for the latest version Perfect for cold weather and winter driving. Maintains temperature between 110 and 120 degrees Two elastic back straps and four cinch straps on the bottom of the cushion help keep the cushion firmly in place Plug into the cigarette lighter of the vehicle to use. Unplug when not in use to avoid battery draining Optional AC adapter is available for home and office use