The Mobile Warming ® (by Fieldsheer ® ) Heated Balaclava is the ideal cold weather head gear designed for comfort and providing hours of heat to protect from the harshest winter conditions. Ideal for long trips in the backcountry, or long days working outdoors, the Mobile Warming ® Heated Balaclava will keep you warmer and outside longer. Made from super comfortable water-resistant fleece fabric. 3 Heat zones (ears and back of neck) are powered with our new 7.4V small footprint Lithium-Ion rechargeable battery providing up to 8 hours of heat between charges. The 4-temperature adjustment allows you to customize your heat depending on the conditions right from your cell phone using Bluetooth control and the MW Connect App. Let us provide the heat so you can stay warmer and outside longer. Balaclava Features: Water Resistant Bonded Stretch Fleece Outer Shell Sweatsheer ® Moisture Wicking Mesh Liner Zapsheer ® Anti-Static Control Chafe Free Flat Locked Seams for Added Comfort Multi-Zone Micro Coil Heating - Left & Right Ears, Back of Neck 7.4 volt Powersheer Lithium-Ion Rechargable Battery 4 Adjustable Heat Settings (90° up to 135°) Integrated Waterproof Touch Control Button Bluetooth®-Enabled Wireless Control MW Connect™ Mobile App Compatible available on App Store® or Google Play Store® Machine Washable Universal Size Battery Features: Powersheer™ Rechargeable Lithium-Ion Battery (7.4V 2300mAh) Up to 10 Hours of Power Per Charge (2+ Hours Hi - 10 Hours Low) USB Cable included Charge Time 3-4 hours* * Charge time is based off using a USB-A wall charger that delivers 5V@2.1A Includes: (1) Balaclava (1) Powersheer™ Rechargable Lithium-Ion Battery (7.4v 2300mAh) - Model MWOB74V02322 (1) Micro USB Charging Cable Replacement batteries: Battery SKU: MW74V023 Download the Bluetooth Heated Apparel User Manual