Features: Combines red light (660 nm) and near-infrared light (850 nm) for targeted cellular support and pain relief Extra-long wrap design provides light therapy across larger surface areas 450 LED light chips deliver warm, comfortable, full-coverage illumination Wireless design for convenient use on feet, knees, hips, low back, neck, shoulders, and elbows FDA-registered for pain reduction and increased blood flow Adjustable strap ensures a secure, customizable fit SPECS: Light wavelengths: 660 nm (red) and 850 nm (near-infrared) in a 1:2 ratio LED configuration: 360 total LED chips (150 sets of 3 chips at 0.5 W each) Light irradiance: 20-40 mW/cm^2 maximum intensity at 0" Automatic 20-minute timer Brightness levels: 100% or 50% Battery: 5000 mAh, 3.7 V Li-polymer Size & weight: 31" x 6.3", 0.3 lbs Material: water-resistant neoprene pad with adjustable strap