This is our most powerful body light that we have available. Both of these spectra (830nm & 850nm) have an incredible amount of research behind them. There is no body light on the market that can come close to the healing power of the BL15 due to it's dual wavelengths of near infrared technology. In as little as 20 seconds you can treat your entire body.
The BL15 has two switches. One switch controls the 830nm, and the other switch controls the 850nm. You can turn on both switches at one time, or, you can choose to just use one at a time.