Sennheiser Rs110 926 Mhz Wireless Rf Headphones Immediately

I've had other Sennheiser products in the past and been pleased with them, but not these headphones. I bought them as a gift for my father in law and went to set them up yesterday. I was generally disappointed by the power supply (a couple of AAA batteries with a life of what, maybe 15-20 hours), but very disappointed by the sound quality. Low humming noise was easily heard anytime the program volume dropped and that was accompanied by an intermittent clicking sound. Tried all three transmitting channels to see if I could get around those problems, but no luck, so back these go!Get more detail about Sennheiser Rs110 926 Mhz Wireless Rf Headphones.