1. Compatible with the following head units with an round 8-pin CD changer connection:
Head Unit: HU401,HU403,HU405,HU415, HU450,HU555 , HU601, HU603, HU605, HU611, HU613,HU615,HU655,HU801, HU803, HU650RDS(with Selector knob), HU650(6CDs), HU850RDS(with Selector knob), HU850(6CDs), HU1205, CR-504,etc
Radios HU-650 & Radio HU-850 with “”PRESET/CD”” round button (marked in red circle) are compatible. ”
2. YT-VHY or YT-V813 are needed for Volvo HU-xxx radios with RTI navigation module.