Hello, thank you for your question. Alexandrite is a wavelength of light. (755nm), there are several manufactures of lasers with this wavelength. The question that you need to be asking is; does the facility you choose have the correct wavelength to treat your skin type. Alexandrite is best for skin types I-III and the NdYag (1064nm wavelength) is best for skin types IV-VI. This is the important question to ask, there are facilities that will use the alexandrite on darker skin types and just turn the energy down low so that it does not burn the patient. Turning the energy down is not as efficient as using the proper wavelength to treat the skin type.Good Luck!