Summary: My suggestion would be to get these only for watching TV/Movies at night. They are AAA battery operated and this is very handy as you can change batteries anytime. If you want quality sound you need to invest. These are OK for the price but I wouldn't listen music with them. Bottom line - depends what you are going to use them for. Good for TV, not good for music. By no means you could call these "brilliant" as other reviewers described.
Summary: Bought this for one reason only to fit to my minelab E-Trak metal detector. The transmitter fits snuggly into the jack at the end of the handle with no support required only a stereo reducing jack to 3.5mm and away you go. No longer do I have this annoying umbilical cord which makes life difficult every time you lay down your detector to dig.
Summary: If you like listening to music in high quality without a tangeling cord, then these are very good sounding headphones. If you want to listen while commuting or in a crowded area, then Bluetooth® is a better choice. Why? Well I can't control the iPhone with the Kleer® technology, but Bluetooth can! So, I will use them at home, watching late night TV with phones, connected to my computer while working. Commuting? No, I will buy an extra pair of Sennheiser MX450 for that.
Summary: This is a great wireless headphone with excellent sound, espcially the in the low frequencies. The bass is really high quality sounding as well as the mids and highs ! The disadvantage with this pair of headphones is the sending/receiving distance, appox. 8 - 10 meters and does not pass through walls, as the FM wireless headphones. However, the sound is really great for a nice prize !!!
Summary: These are excellent for watching TV since the Kleer protocol doesn't do compression so the sound is in sync with the picture. I have three minor complaints: 1) They aren't that comfortable on my ears but I suppose this is individual. 2) Batteries need to be removed for charging. 3) Both the headphones and the transmitter need to be powered on separately. None of those are serious issues for me, but I suppose they might annoy some people so I thought I'd mention them.
Summary: I wanted a pair of wireless headphones for the gym for stationary weights and machine training or on the treadmill. And these are almost perfect. They are little loose and so they tend to slip around your head though though this depends on how big a head you have. They have great bass but not a very wide sound stage but given the price its expected. Its also way better than bluetooth. Also it works great with digital amplifiers which improve the quality over kleer tech.