This cordless neck and shoulder wrap combines 660nm red light and 850nm near-infrared light with constant temperature heating, equipped with 100 upgraded LED beads for full coverage over your neck, shoulders and upper back. It offers 5 adjustable light brightness levels, 3 heat settings, and 3 timer options of 10/20/30 minutes, plus a one-touch lock function to avoid accidental touches. Crafted with soft, breathable, easy-to-clean fabric and an ergonomic wrap design with adjustable hook-and-loop fasteners, it fits securely without slipping. Powered by a built-in rechargeable battery, it delivers up to 3-4 hours of use, letting you enjoy soothing warmth and light care freely at home, in the office, or while traveling.