I was referring to this model:
https://www.amazon.com/ATOMSTACK-Engraver-Compatible-Cutting-Machine/dp/B09N3CFCNR/ref=mp_s_a_1_6_sspa?crid=2AIA0OOXJTWQ5&keywords=atomstack+40w+laser&qid=1657046541&sprefix=atomstack+40%2Caps%2C136&sr=8-6-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUFHUldVQTRJNlFRVDgmZW5jcnlwdGVkSWQ9QTAyMDIyNTgyMkhPUzRFRkhOVTMyJmVuY3J5cHRlZEFkSWQ9QTA3MjY4NTlPVUZaQllERkJRREQmd2lkZ2V0TmFtZT1zcF9waG9uZV9zZWFyY2hfbXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==