LUCKSTAR USB Hand Warmer - 5200mAh Power Bank Rechargeable Pocket Hand Warmer 2-in-1 Indoor Outdoor Warmer Portable Charger for iPhone 7 6s 6 SE iPad Samsung Galaxy and More 2-IN-1 MULTIFUNCTION: The hand warmer comes with a strap for easy carrying, when you feel cold, it can warm you, when your phone runs out of battery, it can charge your phone. DOUBLE-SIDED DESIGN: This double-sided hand warmer can warm both your hands at the same time. Enjoy cozy warmth for your fingers and hands when outdoor & the cold weather, like winter. MINI & PORTABLE: Powerful hand warmer and portable power bank 5200mAh can be used at the outdoor, camping, climbing, tourism, adventure or at the parties, prom, home. You can use it at Spring, Summer, Autumn and Winter for charging and keeping warm. WIDELY USE: This hand warmer is at low ambient temperatures can be used for hand, foot warmer, belly warm, warm knee, waist and other warm, heat-related sites can eliminate fatigue labor, reduce back pain, especially for the elderly, children and office room personnel. LUCKSTAR WARRANTY: 45-Day Money Back Guarantee and 180-Day Product Warranty. If you have any issue with your product, contact us and our team will respond to you within 24 hours!