Gobi Heat Dune 3-Zone Heated Vest in horizon blue. Men size medium. Best has been hooked up to a battery and tested - it works, but comes with the vest only. No battery. Great condition. zipper. Technology: Conductive Thread Heat Zones: 3 heat zones. 2 in the chest and a large zone in the back. Heat Settings: Low - 113° F, Med - 131° F, High - 140° F One-touch LED controller with 3 heat settings - low, medium, and high