Great headphones. The range and strength of the signal for my ipod (which I'm using the headphones for) is powerful.....I can leave my ipod on second floor and go down to first floor and close to the curb before it starts to break up!!!
The one problem (and I had to take one star away because of it), is that if you have glasses (sunglasses, etc.) you'll find the back and top of your ear short on space. Your glasses lay on top of your ears (sometimes going to the back of the ear depending on your ears and head) and the side of the headphone go over your ear. Thus there is only so much space. For me it's not bad as my ears go out a bit so there is space, but others who have ears close to their head may have a real problem.
I found the sound quality to be good. Technology is supposed to be one of the newer ones on the market, thus the price.
As you can see they're not the over the ear type of headphones, so if that's what you're looking for look elsewhere.
One improvement would be to be able to purchase an extra battery pack. After doing several searches I'm unable to find individual battery packs. So if and when your original runs down, you have to wait for it to charge (usually takes around 4-5 hours).
Otherwise this these headphones are really, really good!
Buy Altec Lansing 906/R US BackBeat Headphone with Dongle!