Stay warm and active in the Venture Heat Men’s 13W Heated Puffer Vest with HeatSync. Designed for lightweight comfort and serious cold protection, this insulated vest features a 13-watt carbon fiber heating system with Bluetooth-enabled HeatSync™ app control. Whether layered under a jacket or worn on its own, it's the perfect solution for commuting, outdoor work, and winter activities.How to Use: Fully charge the included 7.4V battery using the provided wall charger. Insert the battery into the vest’s internal pocket and connect it to the power cable. Turn on the heating system using the chest power button or the HeatSync™ Bluetooth app. Select your desired heat level and enjoy hours of customizable warmth. Features: 13W carbon fiber heating system for effective, even warmth Bluetooth-compatible with HeatSync™ app for remote temperature control Heating zones: left chest, right chest, upper back, and neck Lightweight, insulated design for layering or standalone use Water- and wind-resistant outer shell Three adjustable heat settings: High, Medium, Low Streamlined fit for everyday use or outdoor performance Estimated Heating Times: High: 2.5+ hours Medium: 5+ hours Low: 10+ hours(Powered by included 7.4V 5200mAh battery) Material Contents: Outer Shell: Water-resistant nylon Insulation: Lightweight synthetic fill Lining: Soft polyester Heating Element: Carbon fiber heat panels What’s Included: 1 × Men’s 13W Heated Puffer Vest with HeatSync (Black) 1 × 7.4V 5200mAh Rechargeable Battery 1 × Wall Charger Instruction Manual