The Fieldsheer Peak BT heated vest is a low-cost unisex heated vest that is favored by many for its light design that allows it to function as either an outer shell or a baselayer. Engineered to keep outside elements out, the Peak heated vest is constructed with Windshark, a Fieldsheer fabric technology designed to take on moderate weather, and a comfortable 4-way stretch material. Look to this highly breathable lightweight heated jacket to provide a water- and wind-resistant shell. The mid-weight Peak BT heated vest is thick enough to be worn as your outer layer and thin enough to be used under a larger ski heated jacket or heavy work coat. The Peak BT heated vest has integrated, concealed heating panels powered by a sturdy yet lightweight 7.4-volt Mobile Warming heating system. The 7.4-volt system has 3 heating elements, one on the back and 2 on the chest, that add heat to critical areas that keep your core warm. The Peak BT 7.4-volt heating system can provide temperatures ranging from 135°F on high to 90°F on low. On high, expect up to 2 hours of heat on high, and on low, the Peak BT can provide heat for up to 10 hours! The Peak BT has 2 ways to adjust the temperature. First, the built-in touch control button. With a simple button push, you can select from 4 heat settings. Second, we've incorporated Bluetooth control with our MW Connect app. Through the MW Connect app, you can quickly toggle through all connected Mobile Warming devices and 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. Throw it on under your camo, snow-heated jacket, uniform, or just wear it to the next ball game. The Peak BT heated vest is ready for any event.Vest Features:4-Way Stretch Soft Shell ConstructionWind-Shark Protection from Wind, Rain, & WaterMoisture-Wicking Mesh LinerAnti-Static ProtectionMulti-Zone Heat Elements, 2x Chest & 1x BackBluetooth-Enabled Wireless ControlMW Connect Mobile App CompatibleIntegrated Touch Control Button4 Selectable Heat Settings7.4-volt Rechargeable Lithium-Ion BatteryUp to 10 Hours of Power Per ChargeCharge Time 3-4 hoursAvailable in SM, MD, LG, XL, 2XL & 3XLBattery Features:Powersheer Rechargeable Lithium-Ion Battery (7.4V 2200mAh)Up to 10 Hours of Power Per ChargeUL/CE certifiedUSB Cable includedCharge Time 3-4 hours** Footnote: Charge time is based off using a USB-A wall charger that delivers 5V @ 2.1AIncludes:(1) Peak BT heated vest(1) 7.4v 2200mAh Lithium-Ion Battery(1) AC Battery Charger Mobile Warming 7.4V Unisex Peak Heated Vest