Package contains: 1 Pocket Warmer equipped with an integrated rechargeable lithium-ion polymer battery, 1 USB wall charger, 1 USB cord and an instruction booklet. Features: Charges in 4 hours or less, Thin and lightweight, Easily turn off at the touch of a button, Three temperature settings reaching up to 116°F, Shock-resistant, Lasts up to 6 hours of constant heat per charge, Water-resistant