14000mAh Hand Warmers with Charging Case : With the 2024 innovative design, It combines a high-capacity 10000mAh battery and 2*2000mah hand warmer. Not only it is easy to store, but also greatly increases the time of power used.Up to 50 hours of continuous warmth ideal for winter camping, skiing, golfing, and hiking adventures. 1S Rapid Heating& 3 Gears Temperature : Enjoy instant warmth with the press of a button! The hand warmers heat up in just 1 second and offer 3 adjustable temperature levels to suit your needs: 1st level (95 -107.6 ), 2nd level (107.6 -118.4 ), and 3rd level (118.4 -131 ) providing Long-Lasting Warmth for versatile comfort for any situation.You can choose the right temperature for different environments. Advanced Wireless Magnetic Charging : Utilizing innovative wireless magnetic charging technology, Say goodbye to tangled cords! Our portable hand warmers no need any cord, Instant charging in the charging case, One full charge can recharge the hand warmers 2-3 times, ensuring up to 2-3 days of warmth in outdoor adventures or cold weather without the worry of battery life in cold weather. AI Smart Chip& Saftey Protection : Equipped with an AI intelligent control system, the hand warmers automatically stop heating when placed in the charging case and resume charging. Equipped with four safety protections for peace of mind: overcharge, overheating, overcurrent, and short circuit.This portable rechargeable hand warmers has UL,CE,and FCC certifications,UL, CE, and FCC safety certifications to ensure safe and reliable use.