On trend and insulated, our Volter Heated Jacket will help you head on the morning commute in style. This jacket comes with a water-repellent finish, taped seams and insulation, all whilst having a great breathability rating to keep you fresh. When the temperature drops, activate a battery powered heating system for instant warmth. A 5V USB powerbank with a minimum output of 2.1A is required to utilise the heated technology with this jacket. Regatta cannot be held responsible for batteries not purchased directly from us. The heating system will charge your phone too! Please be aware there is no battery included with the jacket. Any 5 Volt battery pack with a minimum output of 2.1 Amps can be used with our heated jackets. Our battery pack specifications are: Capacity: 5000 mAh Input: Micro-USB: 5V DC 1A Output: USB-A x 2: 5V DC 2.1A