In many current vehicles, the radio no longer sits in a classic mounting frame, but was seamlessly integrated into the design. Another Radio retrofit is therefore associated with more effort than before. If you dissatisfied with the equipment, must be found not only a different radio, but often a corresponding mounting frame, possibly cable adapter and especially a time for rebuilding. Remedy FM transmitter that helps to music in digital form, whether by phone, MP3 player, USB flash drive or an SD card can be transferred to the on-board radio, if the radio does not even an auxiliary input for a 3 , 5mm jack has. The tested by me Victsing FM transmitter expands the existing radio additionally to a speakerphone, as it has Bluetooth. In a simple bag of actual transmitter and a 3.5mm to 3.5mm jack coming cable, the terminals can be connected to the transmitter. The rubberised exterior touches his pleasant and ensures a fairly high-quality appearance. The transmitter is simply plugged into the cigarette lighter; the connection holds good and twists not of itself; and via its flexible gooseneck, the device can align as comfortable as possible. The instructions are only in English, however, the operator user does not unsolvable riddle, with a little experimentation, all functions work without any problems. Once the power supply is running (ignition on) should be the same, if possible free of radio frequency transmitter and a radio set. Using the + and - keys is this done at the control unit. After that, the status messages of the transmitter are reproduced through the speakers - the connection is to the car radio. Then the transmitter when the Bluetooth on the phone under the name BT Carkit-M should be sought. After the problem-free coupling is on the handsfree function is available, and also music from cell phone or iPod can be played back. The volume can be changed (by long press) is via forward and backward buttons, a short press switches to the next or last played on the mobile title. Play and pause can also be controlled via the transmitter, but it makes more sense to do this at the terminal because there also tracks, albums or folders can be selected directly; these options are available at the transmitter directly not. Memory Sticks can be connected to the USB port, but then the entire control system must also be dealt with before and back by track skip, but this is not particularly comfortable. Music from a smartphone can not be played directly from the USB port itself, the cell phone is connected there is not even charged. Music from SD cards can also be played back; However, even with the limited possibilities described to control the music. Without Bluetooth can use the port with the included 3.5mm jack cable carried out, thus saving battery power. Although the device performs its functions very well, the connection via Bluetooth is absolutely stable, only a low whistle or rhythmic pounding in the background tarnish the listening something, but can be heard only in quiet passages. It should should be remembered that will be played in handsfree mode everything is heard in the mobile phone, via the FM transmitter. In the worst case, therefore, can be heard in another vehicle in the vicinity in which the same frequency is randomly set on the radio, because up to a distance of about 20 meters of the reception is very good.