We have a K-Laser 1200, which is one of the most powerful and versatile models available.  Keep in mind that with laser therapy, the important thing is to get the right “dose” of light.  Dose is achieved by multiplying power by time.  A powerful laser is preferable to a less powerful one because the time of the therapy is reduced.  Power also allows the laser light to penetrate deeper into the body. Laser therapy works by stimulating cells to heal themselves.  Most of the side effects are pleasurable and include warm and tingling sensations that are actually part of the healing process. Check out K-Laser’s website to see more information.