As for the sound, it's actually pretty decent, and will most likely exceed your expectations. The RP-HT21s have a reasonable amount of clarity, play loud with mobile devices, and output ample bass. No, the sound isn't all that refined, and no the bass isn't terribly tight, but I've heard plenty of $20 to $25 headphones that sound about the same. These guys also sound as good as many entry-level Bluetooth headphones that cost around $50. But that isn't saying much.
We're fans of the
If you're looking for a cheap pair of headphones for casual listening on the go or at the gym, the RP-HT21s, despite their generic looks, actually sound pretty decent and are fairly comfortable to wear. Sure, some people may think you swiped them from your last flight, but the good news is that if you leave them anywhere (or accidentally break them), they'll only cost you $5 to replace. There's something to be said for that.