Rechargeable Li-ion Core Heat Battery, 7V 2Ah (Red, with audible feedback) Included with: Snow Gloves, Fleece Gloves, Mitts, Camouflage Vest, Black Fleece Vest, Stadium Seat Cushion Compatible with: All Core Heat Products Not recommended for: Blind Heat Cushion Built-in 4-level controller (25%, 50%, 75%, 100%) Beeps when changing power level