Verseo Thermo Slim Rechargeable Hand Warmer, Silver Portable Hand Warmer charged with USB port Aluminum shell construction for optimum thermal conductivity Heats up fast Can heat up to 113 degrees and for up to 4 hours of continuous use Rechargeable unit warms for 2-4 hours of continuous use with included USB wire Environmentally responsible solution compared to hand warmers you throw away after use You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!