Sennheiser RS 110. Brand new, never taken out of box. So fabulous for watching TV when you don't want anyone else to hear it, and have your personal volume control. I can listen to music in one room & he can be watching TV, and I don't have to listen to the TV blaring. Excellent sound, husband and I actually both wear ours when we watch TV together, as better sound than the TV audio. Bought this extra set.