I would love to write positively about this distribution, but that is not so. The idea is good, 2 USB ports for cell phone or MP3 player and 2 ports for 12V Navi and Co. The connection cable is thinner than that of my cell phone charging cable. When I look at considering that since 4 devices can be connected - for me that is a no-go. The test has been carried out quickly for me. Even when plugged into the 12V connector by car the plug has smoked and stank horribly. Just poor quality for high price.