Pro:
The device complies with the transmission power and of the covered frequency range (87.5 to 108.0 MHz) my requirements. The quality of the output - I mostly listen to audiobooks - is even with a BOSE sound system OK. With simple car radios should notice less. (You only have to listen to a minimal noise, but that is not to perceive in music and goes through maximum volume on the phone to zero.) In storage situations I was in the other, even cheaper devices sometimes even "overridden" when beside me a car - or lorry drivers and a transmitter on the same frequency used. That has not yet happened to me with the transmitter of Koenig.
Moreover, the article does not affect optical "cheap" and is also dimensionally quite compact. Some alternative models with gooseneck so I had my reservations about the shift in focus here.
Value for money is also good, since about 30% cheaper than the alternative products.
Connection between my smartphone and my Blackberry have immediately works (==> Handsfree)
Note:
Making calls via the speakerphone I have not rated here and not extensively tested, because I have a factory-installed hands-free in my car. But I will certainly test the function on your next holiday and here then submit an addendum with my experiences.
Cons:
Unfortunately the BT transmitter provides, contrary to instructions, for streaming music only "Headphone" protocol. The usual A2DP protocol is not offered and, therefore, it may well not be recognized as an opportunity for you to stream music for most phones with music streaming.
Since then helps but probably only the way of an additional product (eg "B-Speech Rx2" - Link:;. Qid = 1362215896 & sr = 8-1), which then acts as BT receiver and makes the cable connection obsolete.
Conclusion:
I have no device found throughout the market that my requirements are met 100%. Stand: 01.03.2013
Perhaps there is in future to update the firmware for this product or a manufacturer packs the useful addition of FM transmitters and BT Srteaming via A2DP in a unit together. In my first disappointment in defiance I have fair, awarded four stars because of the low price and the function offered. From my expectations ago I'm more inclined to award three stars because the streaming of music via blutooth not working as hoped with this device.
==> It makes no mistakes when you buy the device for that price. It is only important what expectations you have.
Who is on the search for a good speakerphone but should fall back to my experience to better meet a superior device that provides at higher speeds with more adequate hearing and Sprechkompfort. For example. Jabra Journey (Link: PSC = 1)
