5-Speed Temperature Adjustment & 2-Second Fast Heating: Our electric hand warmers feature 5 adjustable temperature levels and 2-second rapid heating technology, providing instant warmth tailored to your needs. The double-sided heating design ensures both hands are evenly heated, delivering a comfortable and consistent warming experience for outdoor activities or cold office days Large-Capacity Battery & Fast-Charging Case: Each rechargeable hand warmer is equipped with a 2000mAh built-in battery, and the set comes with a 10000mAh fast-charging case. This rechargeable hand warmers 2 pack configuration ensures long-lasting power, while the charging case’s LED power indicator displays real-time remaining battery, so you never run out of warmth unexpectedly Up to 24 Hours of Long-Lasting Battery Life: These reusable hand warmers offer an impressive 24-hour maximum battery life on a single charge, powered by the combination of the hand warmer’s internal battery and the high-capacity charging case. Whether you’re camping, hiking, or commuting, you can rely on these hand warmers rechargeable to keep your hands warm throughout the day Intelligent Temperature Control for Safe Use: Built-in smart sensors continuously monitor and adjust the temperature to prevent overheating, ensuring a safe and comfortable warming experience. The electric hand warmers prioritize your safety while delivering efficient heat, making them suitable for all ages, including children and the elderly Compact & Lightweight Portable Design: Measuring 3.5 x 1.45 x 0.86 inches, these rechargeable hand warmers are compact and lightweight, easily fitting into your pockets, gloves, or backpacks. Their portable design makes them the perfect companion for outdoor adventures, winter sports, or daily commutes Electric Hand Warmers Rechargeable 2 Pack，24H Heating 5 Levels Heat Double Sided USB C Hand Warmer Gifts for Christmas, Outdoor, Golf, Hunting, Camping Accessories