-Dual red light and emerald light 650nm and 532 nm -attachable muscle stimulation technology Laser purchased only 6 months ago, works perfectly as I have only been able to use at home, my plans have changed so I will not be renting an office space to put this into good use with clients. Approved for over the counter use, but helps to have knowledge of cold lasers. Perfect for Dietitian, chiropractors, fitness professionals, or doctors/med spa. Serious buyers can come see it in action, it is currently disassembled as I have just moved. It does have a case to transport it in as well as owners manual. Price is firm.