iHateTheCold Rechargeable Reusable Maxi 8800mAh USB Hand Warmer / External Battery Pack / Power Bank / USB Charger for smartphone and tablet / LED flashlight and Strobe Light (Silver) Aircraft grade aluminium casing heats up to keep your hands warm SafeTemp automatically regulates and throttles temperature for a more even heat, and no fear of overheating. Two temperature settings: low 41c (about 8 hours runtime) and high 49c (about 7 hours runtime) when in room temperature Rechargeable 8800mah lithium-ion battery charge your smartphone and electronic devices. Your hand warmer doubles as a power bank Powerful 1W LED flashlight and strobe light to find your way in the dark 12 month warranty - your satisfaction is guaranteed!