Clarion THD300 HD Radio Tuner Compatible with VZ300, CZ500, CZ300 HD Radio Module Compatible with CZ500 / CZ300 / VZ300 iTunes Tagging Ready (iTunes Tagging is not available for VZ300) HD Radio Use iTunes tagging to purchase songs heard on the radio in iTunes (CZ500 and CZ300 only) View program service data like artist/track info, weather and stock info, etc.