The Backyard Expressions Luxury Heated Camp Chair is the best choice for all your activities. This chair features a USB - powered heating technology with two heating zones, one in the seat and one in the back for your added comfort. Built on a durable steel frame with padded hard arms for stability and comfort you will be able to relax and stay warm at any outdoor activity. Works with any USB battery pack, NOT INCLUDED WITH CHAIR and last for hours. Simply plug the cable into the USB port of your battery and start feeling the warmth. Storage pocket was added underneath the seat for your battery to keep it handy, safe and accessible. We also added a cup holder for easy convenience as well.