The speakerphone works without problems and the Verständigigung is very good. The device itself would therefore deserves 5 stars. Has been described by other buyers sufficiently. A flop, however, is the retaining clip. This Klip is intended to attach the speakerphone to the sun visor. Nokia made in China for sun visors made in China (may not be thicker than ... let's be 8mm) otherwise breaks the bracket. To service the Chinese namely counts a predetermined breaking point in the headband ... took less than 2 seconds and then the part was broken ... so 1 * for the holder.