Temperature adjustable and fast heating: heats up in 3 seconds with 3 temperature levels. LED display shows the current setting for easy control. All-day warmth: built-in 3000mAh battery provides up to 8 hours of heat. USB charging for convenient recharging. Comfortable, universal fit: unisex heated bracelet with a one-size-fits-most design that does not restrict finger use. Soft, comfortable to wear and easy to adjust. Hands-free and portable: lightweight with adjustable elasticity for comfortable heating outdoors. Keeps your hands warm without hindering activities. Use scenarios: - Cold commutes, outdoor walks, or waiting for transportation where you need continuous warmth without bulk. - Working at a desk or table where you want warmth without limiting finger dexterity. - Outdoor activities such as camping, fishing, hiking, or attending cold-weather events where hands stay warm. Material, function and performance are designed to offer reliable warmth, easy control, and practical wear for everyday use.