I have two pairs of Walker Razors, one is rechargeable and one just uses AAs. I use them during gun season and find them to work really well; so well in fact I had to stop wearing them in the rain cuz the amplified sound of falling rain puts me to sleep. They last quite awhile on AAs, the rechargeable pair don’t last quite as long. I put my son in the second pair and with the volume set at half we can carry on a conversation at a whisper sitting side by side.