Control knob has 3 Levels of delay on the compression (timeframe when sound returns to normal). The other top competitor on my list is the Creative Roar 2 which boasts the best features but falls short in sound quality (I havent tried the Roar Pro but the price has been cut recently). And they squeak. Just as describe. seed beads are small and very pretty! I bought these because I dont like the womens sweatpants because they always end up wayyy too big on me, in the waist and in the length. The install process is as simple as you can get. These are not Birks, although theyre meant to look like they are. I can easily see me continuing to wear it for an extended time as I heal and then re-build my core strength and tighten up my abs. I have the hangers facing alternating ways every few items to balance it out, as it will lean and tip over otherwise.