MOBILE WARMING MEN'S MERINO HEATED PANTS BLACK XX-LARGE FEATURES: Heavyweight Base Layer Multi-Zone Heat Elements: 2x Inner Thigh & 1x Upper Waist Bluetooth Control with MW Connect available on App Store® or Google Play Store® Integrated Touch Control Button 4 Selectable Heat Settings 7.4volt Rechargeable Lithium-Ion Battery Up to 10 Hours of Power Per Charge Universal USB Charging Input Battery Features: Powersheer™ Standard Rechargeable Lithium-Ion Battery (7.4V 2200mAh) Up to 10 Hours of Power Per Charge UL/CE certified USB Cable included Charge Time 3-4 hours* * Footnote: Charge time is based off using a USB-A wall charger that delivers 5V@2.1A