Milwaukee L4 HBLB-301S USB Rechargeable Heated WORKSKIN Base Layer Inc 1x L4 B3 3.0Ah Battery, 1x Cable, 1x Wall Plug Size Small 4933478459 Powered by L4 USB rechargeable REDLITHIUM battery pack, the L4 HBLB-301 rechargeable heated WORKSKIN base layer fully heats-up in 2.5 min - heat is created and distributed to the chest and back to keep you warm in the harshest of work conditions. A one-touch LED controller allows the user to select from 2 heat settings, delivering ideal heat for any environment. Machine washable.  Supplied with 1x L4 B3 3.0Ah Battery, 1x Cable & 1x Wall Plug. FEATURES Mid-weight construction out of durable, pilling resistant material, keeps body warm and dry Fully heats-up in 2.5 min Heat is created and distributed to the chest and back Powered by L4 USB rechargeable REDLITHIUM™ battery pack A one-touch LED controller allows the user to select from 2 heat settings, delivering ideal heat for any environment Durable, pilling resistant material with raglan designed sleeves and seamless shoulders for improved mobility and comfort Superior run time – Up to 180 min of heat on low level L4 battery holder - concealed battery pocket for minimal user interference Machine washable SPECIFICATION Voltage: 4v Article Number: 4933478459 Battery Pack Capacity: 3.0Ah Material: 100% Polyester Size: Small Weight With Battery Pack: 0.50 kg (L4 B3)