Rechargeable Double-Sided Hand Warmer & 4,400 mAh Power Bank For Most Cell Phones & Mobile Devices. Built-in Micro Led Flashlight. Free Pouch Included. Fast, double-sided warming with high and low settings to keep both hands warm. Its aluminum alloy cover prevents escape of heat via thermal conductivity. 100% Satisfaction Money Back Guarantee! Rechargeable via AC adapter or USB. Each full charge lasts 4 hours (high setting) to 5 hours (low setting) approximately. Gives a full charge to most mobile devices, phones and smartphones like iPhone 6, 6S, 6+, 5, 5c, 4/4s, Samsung Galaxy S5/S4/S3, Nexus and many others, via included Female USB cable (just needs male USB cable of each phone). Helps soothe the pain and uncomfort of Raynaud's Disease / Syndrome sufferers and Sufferers with arthritic hands. Small pocket size aerodynamic design makes it perfect for carrying anywhere since it fits into any pocket. Built in emergency micro led flashlight