Summary: They are amazing. Since they are able to broadcast music from your phone to FM, I stream Pandora while I drive and when I get a call, the music pauses and I can just take the call. Used in connection with the Vlingo app, it's a beast!
Plantronics K100 Bluetooth Carvisor and FM Transmitter
10 February 2014
Excerpt: Works really well and for the price it is a worth while buy. The volume is really good and I see that some people complained that the ringer is to low but that is not true because the phones ring tone plays through the speaker. The FM transmitter works well and you are able to play music and talk through your car speakers. the key is to find a good frequency so that you don't lose the signal.
Summary: Pairing this K100 hands free with my iphone 5 was easy and quick. Took it out to the car, read the directions, made a call and it was very clear, in fact the person on the other end was surprised how clear it was. Haven't tried the FM feature yet. Making a voice activated call is easy as well, pressing the center button until two beeps are heard then speaking the name of the person you want to call, that easy! Overall I think I should've had this a long time ago!