660nm & 850nm Infrared Light Comfort Wrist StrapFeatures: 1. Our multifunctional red light therapy strap integrates dual spectrum, pulse mode, and intelligent timing into one, providing you with truly efficient red light therapy. 2. The 48PCS 660nm and 850nm LED dual chips can promote blood circulation, accelerate tissue repair, relieve excessive fatigue, and restore wrist muscle function. 3. It helps alleviate wrist and hand pain, improves various hand issues such as carpal tunnel syndrome,