【Latest Heat Tech & High-quality】Comparing to traditional heating technology, JISULIFE hand warmer adopts the latest dynamic heating balance technology, 3s fast heating, intelligent induction use, and long-lasting constant temperature. Made of high-tech aviation-grade aluminum and ABS materials, skin-friendly and warm. Bring you a warm, comfortable and safe experience.【3 Heat Levels & 8 Hrs Lasting Heating】JISULIFE hand warmer heats up in 3 seconds from double sides. Simply press the button to switch the temperature between 3 heating levels: 104℉ (40℃ ) /122℉ (50℃) /140℉ (60℃), Charging the hand warmer for 3-3.5 hours and warm your hands for 4-8 hours! Fitting for outdoor sporting, fishing, hiking, camping, skiing, travel, walking the dog in cold weather.【TYPE-C 2A Fast Charge and Power Bank Function】 Equipped with USB-C charging port which makes charging 2 times faster than conventional chargers, fully charged in 3-3.5 hrs. JISULIFE rechargeable Hand Warmers not only a hand warmer but also be used as a power bank to charge your electronic device at any time.【Smart Digital Display & Pocket-Size】JISULIFE rechargeable hand warmer with Real-Time LED digital display keeps you informed of the selected heat settings and battery remaining. You can plan your charging time and avoid getting burned. Pocket size, comfortable and small, suitable for your hands to hold.【Warming Winter Gifts】Great gift for Christmas, Birthday, Anniversary, Thanks Giving Day, Valentine’s Day, etc. Buy it now to get: (1) Hand Warmer (2) Cloth Bag; (3) USB-A to USB-C Cable; (4) User Manual; (5)Lanyard; (6)Timely & Considerate Customer Services.Certificated with CE, FCC, UL, ROHS, PSE safe to use.