Around $30 max, very comfotable, good noise-blocking, haven't noticed a lack of sound quality,
and they seem well built, and don't look cheap. This echoes the reviews I watched/read. A step below audiophile,
but my old ears are a few steps below that anyway. Comes as 1/8 inch stereo plug with a screw-on 1/4 inch adaptor,
and has a small springy coiled section in the cable. The cable is about 4 feet long, unstretched.
A spec booklet comes with a page of basic info in 11 languages. I bought mine at Sweetwater for $25,
and free shipping via Fed-Ex didn't take long, with update emails during the process.
https://www.sweetwater.com/store/detail ... headphones
I should add that my Yamaha rompler Grand Piano sounds quite nice with these headphones, and I imagine the spec was optimized
for the yamaha/casio home users market, for which sounds improve frequently to gain some little competetive edge.
Cheers