【2 Packs Hand Warmers】The 2 in 1 design hand warmers with a stylish look are portable and compact. Ergonomic design to make you more comfortable. Portable pocket designs fit for traveling, sports, football, hunting, golf, fishing, hiking, camping, skiing, etc. 【Stable Instant Heat】No more longtime wait, electric hand warmers using the premium chip control system. Double-sided heat up to 131°F/55°C operating temperature with 1-second fast heating and 3 levels of temperature settings for adjustable and precise stable comfortable warmth. 【Long Battery Life & Rechargeable】2 Packs 4000mAh hand warmer, a single full charge will last for 12 Hours, can meet the needs of one day's use. 3 levels indicator lights keep you informed of the remaining battery and heating status, Perfectly meet your different needs. 【High-performance & Safety】Hand warmers rechargeable are made of high-tech lithium battery, aluminum, and ABS which certificated with UL, CE, FCC. Built-in intelligent protection system that is provided with the safeguard of power on, short circuit and overloading, etc. It is shockproof, anti-scald, explosion-proof, and radiation-free. 【Great ideal for Gifts】Keep your hands warm throughout the day while in office work, class, or any outdoor activities in the cold winter. With this hand warmer, no longer afraid of the cold of winter. It is a great birthday or festival gift for your kids, friends, or family, suitable for women, men, elders, girls, boys, youth. Hand Warmers Rechargeable, Dnaleao 2 Pack 4000mAh Electric Portable Pocket Heater, Heat Therapy Great for Outdoors, Hunting, Golf, Camping, Warm Gifts（Black）