Sellcoldlasers.com.  Vetrolaser LLC.  I believe I offer the best customer service in the cold laser industry. I am in the Chicago area (Buffalo Grove,IL) and I personally answer all calls from 6 a.m. to 10 p.m. central time. Please feel free to call me with any questions. 1-800-742-8433 Dr. Daniel Kamen, D.C.