1760mW Handheld Cold Laser Therapy for Knee Pain Arthritis Relief 660/810/980nm. Power Level: 25%/50%/75%/100% (440mW 880mW 1320mW 1760mW)Adjustable. Near Infrared Laser 810nm. 810nm is located in the near infrared spectral region (760-860nm), the penetration depth is deep, both tissue penetration and cell repair capabilities .
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