Features:     1. Double Side: double-sided heating, you can choose that best temperature according to your needs, even in that cold days can also make your hands stay warm.     2. High Quality Material: Our hand warmer it made of plastic material and Eco-friendly lithium battery, safest Hand Warmer ever.     3. Portable Design: Designed as a portable double-side heating, this hand-sized hand warmer is silicone corner protection anti drop.perfect fits your hands and pockets.     4. Perfect Winter Gift: It's must have a hand warmer to spend cold winter, especially for raynauds, arthritis, muscule pain sufferers for heat therapy needs. This device keeps your hands warm on cold days.     5. Safety and explosion-proof: automatic power off to prevent overcharge / isolation between heating plate and warm hand treasure to prevent short circuit and explosion. IC chip and battery pack are suitable for protecting core explosion-proof links.         Descriptions:     2-in-1 hand warmer, can also be used as a mobile power to charge your cell phone, can be carried in one hand, or in a pocket, can be used to warm hands, feet, knees, belly. You can carry it with you during sports, fishing, hiking, camping, skiing, traveling or outdoor sports.         Specifications:     Material: plastic     Color: rose gold, champagne gold, silver, blue(optional)     Size: 102x59mm     Battery: 2000MAH     Temperature: 40-60 degrees                   Package Included:     1 x Hand Warmer     1 x Cable     1 x User Manual         Notes:     1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.     2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.