SA6 and the W-1 Wireless Bundle Kit

The headphones alone are excellent--they have great frequency response and presence. I am not a technical type but I do own Etymotic ER-4's and these sound better to me.
These use flexible ear pieces like all other earphones in this category. They eliminate a lot of ambient sound but may take some getting used to if you have not used this type before. They come with several size ear pieces and I suspect most everyone will find a size they are comfortable with.
The wireless transmitter and receiver works well and allows me to use my I-pod without a dangling wire. The earphones can be used as a normal wired type or the wire can be removed and used with the wireless transmitter and receiver--the headphones sound exactly the same to me, either way. This is surprising, as normally wireless introduces sound quality erosion.
I do get some occasional very short dropouts in sound in the wireless mode if I have my I-pod in my pants pockets but have had no problem if I keep it in a top pocket. Line of site presents no problem--I have used at 30 feet with wall in the way from my stereo receiver and my PC. These are superior to other wireless products I have used that can not compete in terms of range.
The wireless receiver can hang in front or over the back of your head. It is a little large and a bit clumsy if you like it hanging in the front--so I have become a back of head hanger.
The on/off switches on the receiver/transmitter are a little small and you need to be careful not to hide the light when you turning them on and off.
I have not run out of charge after using 8 hours--I have seen other reviews that indicate you can expect 8-10 hours.
These headphones sound as good to me as my Etymotic at close to the same price--this wireless option makes these my first choice.Buy SA6 and the W-1 Wireless Bundle Kit!