The subject line says it all. I've read good reviews of these $19 electronic hearing protector headsets, so with my latest www.harborfreight.com order, I ordered a set. Tried them today at the outdoor range, they're great!! It's a nice change to still be able to hear all the normal background sounds, but they automatically mute with louder sounds, like gunfire. Even chambering a round will cause them to mute briefly. Takes 2 AA batteries, not included. It seems very well made, time will tell. The only downside is that orders from harborfreight take a few weeks to get delivered. Not a problem for me, they tell you about that when you place the order.