DetailsThe Fieldsheer® powered by Mobile Warming™ heating technology 12-volt Summit Duck Down Heated Jacket with integrated Bluetooth® wireless connection features a premium heating system encompassed in the highest quality, responsibly sourced, duck feather insulation. It has classic looks and performance features and is constructed of a lightweight 100% Nylon Outer Shell with ultra-warm Duck Down core. Designed for hikers, climbers, or anyone who goes between various climates and needs something that is easily packable but performs when applicable. The Summit features 2 hand-warmer pockets, an internal pocket for storage, and a removable drawstring closure hood. To keep you warm in cold conditions, the Summit Heated Jacket is heated with FieldSheer's premium 12-volt heating system. Like all FieldSheer 12-volt systems, the Summit targets more heat zones, 4 on the back and 4 on the chest. The chest heat zones run all the way down to the zippered hand pockets for added warmth. On high, expect up to 3 hours of heat, and on low, the Summit can heat up to 11 hours! Temperature control is simple with 2 ways to adjust the heat. First, the built-in waterproof touch control button. With a simple button push, it lets you choose from 4 instant heat settings with multi-colored LED indicator. Plus, it incorporates Bluetooth® control with the free to download (via App Store® or Google Play Store®) MW Connect™ app. Through the free MW Connect™ app, you can quickly toggle through all connected Fieldsheer® powered by Mobile Warming® technology garments and adjust individual heat levels to your liking. The MW Connect™ app allows you to get real-time updates on battery levels and update your garments when new firmware becomes available. The Summit Heated Jacket provides instant heat when the weather turns cold, keeping you outdoors and enjoying your favorite activity. The Summit is powered by a Powersheer™ XXL 12-volt Rechargeable Lithium-Ion Battery (12V 5200mAh) – the largest battery capacity in the Powersheer™ line. The included AC wall charger (12V) fast charges in 4-5 hours so you are ready to go quickly. The 12V DC output port is compatible with all FieldSheer 12V heated gear. Additional Universal USB output allows you to charge your smartphone and other devices. The integrated Nightsheer™ LED flashlight is built in to light your pathway.