The Fieldsheer powered by Mobile Warming heating technology Bluetooth-enabled 12-volt Foreman Heated Vest features a classic look and heavy-duty fabric construction. It is designed for ranchers construction workers linemen or anyone who works outside for extended periods in the cold. It is constructed of heavy-duty 5 oz 100% Cotton Canvas Outer Shell and an anti-static quilted 3 oz polyester thermal liner. The Foreman has a heavy-duty zipper 2 large front hand pockets and 2 interior pockets. The Foremans heating system is powered by a long-lasting 12-volt Lithium-Ion battery. The vest also features a USB port to charge your mobile devices a powerful built-in LED flashlight and 4 large heating panels 2 in the chest and 2 on the back. It can provide heating temperatures ranging from 135F on high to 90F on low. On high expect up to 2.8 hours of heat and on low for up to 11 hours. The Foreman has 2 ways to adjust the temperature. First the built-in touch control button is a simple button push that allows you to choose from 4 heat settings with LED indicator. Second there is incorporated Bluetooth control with a MW Connect app. Through the free MW Connect app you can adjust individual heat levels to your liking. MW Connect allows you to get real-time updates on battery levels and update your garments when new firmware becomes available. The Foreman comes as a complete package with the 12V 5200 mAh lithium-ion battery and an AC charger. You can expect up to 11 hours of power per charge. Charge time is 4 hours and 10 minutes.