Dont know why the description still mentions CL15 but then you can run this at CAS15 at a lower frequency. I’m glad they didn’t just send a defective product, but QC’d it and stopped my order before shipping it. Use for the ps4, terrible and definitely not worth the price. These days it seems that up to 20% of what I buy at Amazon is one of their own private brands. I own almost all the Bose QC products and its near comparable to QC20i. It is just too short in width. But if you are looking for a non slip, comfortable shoe that will fit someone who may have decreased mobility or swelling in their legs. This is not a fault of the ram, it is a fault of the mother board. Get em lolUpdate ) I haven’t worn them again yet but they were comfortable the height is sturdy & they’re really ideal for a date night or all black outfit. Only then will they sound natural.