【Graphene Heating Technology】Utilizes advanced graphene heating elements for efficient and consistent warmth distribution. 【Three-Level Temperature Control】Adjustable heat settings (40-45℃, 50-55℃, 60-65℃) for personalized comfort in various conditions. 【Far Infrared Therapy】Deep-penetrating heat reaches 30-50cm beneath the skin, promoting blood circulation and alleviating cold. 【Multi-Purpose Design】Versatile hand warmer doubles as a heating pad for hands, abdomen, back, legs, and waist. 【Eight-Layer Heat Retention】Advanced thermal insulation technology effectively traps and maintains warmth for extended periods. 【USB Rechargeable】Compatible with standard power banks for convenient charging and portable use. Specifications: Dimensions: 430mm x 320mm Power Bank Compatibility: 5000mAh (not included) Material: 100% Polyester Fiber (excluding coating) Heating Method: Far Infrared Maximum Power Output: 9W Operating Time: 3-6 hours (with 5000mAh power bank, not included) Temperature Settings: Low (40-45℃), Medium (50-55℃), High (60-65℃)