[660NM 850NM Working Effect]: 660nm red light can reach deep layers of the skin so that it stim-ulates cellular repair, increases circulation. 850nm near-Infrared light is Invisible to the naked eye, but it can penetrate and cause ther-mal effects to promote blo-od circul-ation, enhance metab-olism, improve c-ell vitality, which is very helpful to muscle recovery and body pain relief! [Multi-Function Ther.apy Belt]: This therapy pad adopts 3-in 1 LED diodes design, 170pcs 660nm and 85pcs 850nm chips, 255 chips in total. Equipped with 5 levels Brightness Setting(L0-L4), more brighter more hotter. 6 Gears Time Setting Function(5/10/15/20/25/30mins). Belt Size: 50.3*4.6 inch, suitable for most of people's needs. [Perfect For Home Use or Travel]: The infrared light ther.apy device has Wide voltage AC 100-240V plug and the NIR wrap also can be connected to power bank, allowing you to enjoy the relaxation anytime, anywhere! You can turn it on while exercising, driving, travelling! [Wide Applications]: You can enjoy red light ther.apy for a fraction of the cost, this is an economical way to ease pain at home. This wearable wrap can be used on the back, arms, shoulders, knees, various body parts. And it's a ideal gift for your girlfriend, parents, friends etc.