KDC-BT53U CD/USB-Receiver with iPod Direct Control - Bluetooth Built-in Detachable FaceplateMade for iPod & iPhone *CD doorOptional IR remote controllerEqualizer built-inDigital Time Aligment (DTA)Bluetooth unit built-in USB Car Stereo KDC-220UICD-Receiver with Front USB & AUX InputKDC-130UBCD-Receiver with Front USB & AUX Input.KDC-130UGCD-Receiver with Front USB & AUX Input.KDC-130URCD-Receiver with Front USB & AUX Input.