• Heated socks with built-in heating element for quick and even warming. • Powered by 3.7 V, 4000 mAh lithium polymer batteries, providing between 5 and 12 hours of heat depending on the temperature setting. • Three adjustable temperature levels: high, medium, and low, to suit your heat needs. • Made with high-quality cotton and spandex, they are breathable, quick-drying, and offer excellent thermal insulation. • One size fits all, suitable for shoe sizes between 38 and 46. • Ideal for outdoor activities such as skiing, hiking, camping, hunting, and fishing, as well as for indoor use. • Includes one pair of socks, two batteries, and an AC charger. • Product weight: 0.5 kg.