I admit why only 3 stars because:
1. Are the connections are very closely
2. Connect the cable from the device itself, so long as one does not prophesy sometimes: Where to put it?
3. the USB port located on the back (as viewed from the main distribution frames)
4. ONLY 3x 12V consumers can be gespeißt
5. the supplied adhesive pad sticks everything ... just not there and where it should