Rechargeable 2 in 1 Portable Travel Pocket Hand Warmer and Power Bank Black

From 104°F to 140°F, there are 3 levels of heat to choose from, by a simple button. At the same time, intelligent double-sided heating design can make your hands feel warm on different sides. With 3 seconds of rapid heating. electric hand warmers is made of high-tech aluminum, with a pebble-like smooth touch. Double-sided heating keeps your hands warm at all times, creating a warm world for you in winter.  Used as a power bank, rechargeable hand warmer built-in 10000mAh lithium ion battery, can give a full charge to mainstream digital devices on market, compatible with iPhone, Samsung Galaxy, Nexus, other Android phone and Tablet PC. Large capacity ontinuously warm your hands for 4-8 hours, charge your phone 2-3 times.  Only press and hold the button for 3 seconds to switch from power bank to hand warmer mode. 3 different heat levels free adjustment: low (95~108°F), medium (104~118°F), high (118~131°F), let you have more choices. 3 indicator lights keep you informed of the remaining battery and heating status, hold in hand, warm in your heart.