Unit was supplied with the incorrect wiring harness adapter. I have not been able to install it into my car and see if it even works due to this problem. Unit is shown to control both front and back speakers however the wiring harness was supplied with only wiring for the front speakers. Very little information is available in english. All the websites are in Russian and can not be translated. There is no english manual available that I have been able to find. I have contacted the seller with no response so far. Would not recommend this unit.
got it thanks