Widely regarded as one of the best sounding headphones for the price.
From Amazon's product page:
Connectivity Technology: Wired
Sport clip design fits neatly around each ear, with pivoting earplates for a comfy fit
Titanium-coated drivers deliver accurate sound reproduction with little distortion
Neodymium iron boron magnets offer deep bass performance for an extended frequency response
Cord measures four feet long; L-shaped 3.5 mm plug
Limited lifetime warranty
Plenty reviews on Reddit, Head-fi, Whirlpool, YT etc.
They sound great but mine never lasted very long no matter how gently I treated them. I went through about four in quick succession. The cable is also very thin and tangles like wool yarn. Having said that, still worth getting just to experience the amazing sound from something so small and light.