Bought this for my aging dog to do laser treatment for her achy, arthritic joints (the Vet was charging $95/visit). Still works, but sitting in my closet the last 2 years.
Comes with booklet and there are some instructions online, but best for someone who has some idea what they are doing.
More about the product: https://www.laserriffic.com/product-page/cefco-photon-resonator & https://www.laser-riffic.com/laser-products