This portable hand warmer combines warmth and power in a compact device perfect for cold weather. Featuring double-sided heating with three adjustable temperature levels, it warms your hands within seconds while the intelligent temperature control prevents overheating. The device offers settings of 104°F, 122°F, and 140°F to suit your comfort needs. Constructed from aircraft-grade aluminum alloy and ABS materials, this hand warmer is built for durability and safe daily use. The integrated 5000mAh rechargeable battery serves dual purposes, functioning as both a hand warmer and an emergency power bank for your mobile devices. It provides approximately three hours of continuous warmth depending on the selected heat level and ambient temperature. The palm-sized design fits comfortably in pockets or bags, making it easy to carry during outdoor activities, commutes, or travel. This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm under Proposition 65. The device charges fully in about five hours via USB connection and includes built-in safety features to protect against overcharging and overheating.