Customer sevice isn't that good. I bought a unit for my car, and the unit quality is very poor, that i can live with considering th price, but there's a whine coming from the speakers only with the eonon unit. I dropped the car at the dealer and they inspected the factory bose system, and there was no faults. So the issue was the eonon unit. They tried multiple things to get rid of the whine with updated software and fiddiling with settings and nothing helped. They offered me to pay for returning the defective unit or pay a little more than the shipping fee and they would send me a new unit, new unit arrived i installed it, and only 3 speakers were working, and after a few hours of running time the whine slowly came back. I've given up with trying to reach an agreement with customer service and accepted my almost 300£ lesson