Rating: 
Summary: Died after 40 days
Review: I was very happy with the headphones until one afternoon they stopped working. I played with the controls and modes without luck. I moved them around on my head and they began working again (as if a wire was not making good contact somewhere). The next day they died completely.I called sony since they were still under the 90 day waranty and after two long phone calls they said that they are eligable for replacement. However, they will be replaced only with a refurbished set that is "similar", but the person on the phone could provide no details on what kind of replacement this would be. For the price I would expect better service (ie money back, replacement with new unit), and that they would last more than fourty days.
Rating: 
Summary: Very pleased
Review: I've had these for about 6 months. They sound great and work very well far from the source. To me the most important part of the headphones is how comfortable they feel. These feel good, but I eventually feel the need to remove them [perhaps it's the earrings].
Rating:
Summary: Terrible sound quality- like a cheap radio (I returned them)
Review: This sony PRODUCT MDR-RF975RK was aweful. The volume was very low, I had to crank the volume on my sterio to hear anything, there was lots of static and as you moved around it would suddenly turn into a deafening screeming sound. I was unable to use these comfortably at home or at work. In neither place do I have a cordless phone, but there was tons of interferance and they were so abrasive to my ears I gave up beacuse I was afraid I'd get ear damage. I let them charge for a full 24 hours before I used them.
I would not even try these- they sound worse than a 2$ raido speaker. My guess is that you have to have a chord, or maybe infared technology instead, or maybe you can;t live in a city ( like I do), and must not have any electornics anywhere near them.
I bought these from ( and returned them to) Vanns, which was A GOOD COMPANY to deal with. I thank Vanns for refunding my money so quickly.
Rating: 
Summary: Light wt, easy to use, battery will not charge correctly
Review: We bought the 900 MHZ unit because of its light wt. and distance of use. We spent the first 48 hr charging it like directed, it should have taken 24 hr., but the light did go off finally. The unit worked great all around the house with very little static. After using it 5 days the battery ran out, we put it on the recharger for another 48 hours, and the charging light never went off as directed telling us it was now charged compleatly. We called Sony and was informed the battery charge light and charge should shut off after 24 hours if not it is defective and should be replaces or repaired. We took it back and got another unit only to have the battery light never shut off after 36 hours the first time around. Sony no longer has any service centers and sends you to "Parts/Accessory Inquiries" these people know even less about this device. Are the direction wrong, will the unit battery give out from over charging, will the head set finally not recharge at all, for $150.00 thoses are big questions.
Rating:
Summary: Light wt, easy to use, battery will not charge correctly
Review: We bought the 900 MHZ unit because of its light wt. and distance of use. We spent the first 48 hr charging it like directed, it should have taken 24 hr., but the light did go off finally. The unit worked great all around the house with very little static. After using it 5 days the battery ran out, we put it on the recharger for another 48 hours, and the charging light never went off as directed telling us it was now charged compleatly. We called Sony and was informed the battery charge light and charge should shut off after 24 hours if not it is defective and should be replaces or repaired. We took it back and got another unit only to have the battery light never shut off after 36 hours the first time around. Sony no longer has any service centers and sends you to "Parts/Accessory Inquiries" these people know even less about this device. Are the direction wrong, will the unit battery give out from over charging, will the head set finally not recharge at all, for $150.00 thoses are big questions.
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