The Chaheati 7V Battery Heated Seat Cushion is the ultimate portable heated seat. The 5000mAh battery powers this cushion, so you can enjoy a family picnic, baseball game, or lazy day by the swimming pool for hours at a time. This battery seat cushion is easy to use: just charge up, plug-in, and turn on. Easy to maintain, it is machine washable on a gentle cycle. This battery warming seat cushion is designed with an extra-large, integrated heating panel to keep you warm for up to 5 hours. It also features an innovative touch-button control technology with 3 level settings. It also has a 24-inch adjustable shoulder strap and a waterproof battery pocket for easy portability. This seat cushion is 16-inch long, 14-inch wide, and 2.5-inch thick.