Portable Red Light Therapy Device Multi-function for home use. 9Pcs 660nm Red Light -Fit for superficial treatment effectively absorbed by skin, repair skin problem. 1Pc 810nm Near Infrared Light (810nm is outside of human visual spectrum, so when it working, we can't see this one by naked eye.) -Good for deep tissue, joint, muscle. Deeper into skin, more effectively, relieving pain.
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