The Milwaukee M12HJBL5-0 12V Heated Jacket (Size M) is powered by an M12 battery pack and features a controller with a 1A USB port for charging mobile devices. It provides heat on demand through sewn-in carbon fibre heating wires that distribute warmth to core body areas and front pockets, offering up to 8 hours of heat on a low setting with a single M12 REDLITHIUM 3.0 Ah battery. The jacket includes an easy-touch heat controller with three settings (High, Medium, Low). Its TOUGHSHELL stretch material (90% polyester, 10% spandex) is designed to withstand harsh working conditions and deliver up to 5x longer life. FREE FLEX mobility enhances movement, especially when working overhead. The improved slim fit design with an extended back helps retain heat. It is water and wind resistant for comfort and durability in adverse environments, and features large hand and chest pockets for storing mobile devices. The jacket is machine washable and dryable. Note: Battery and charger are sold separately.