Happy with your vehicle's radio, but longing for multi-disc CD playback? Pioneer's CDX-FM687 6-disc add-on CD changer will play your CD-Rs, CD-RWs, and standard CDs — through your FM tuner! The double-floating, anti-vibration system protects the changer from skipping, so you enjoy flawless playback. A wired display/controller and a wireless remote are included for easy operation. Pioneer's add-on CD changer installs conveniently — thanks to its built-in FM modulator, there's one less box to mount. The changer can be mounted at any angle (from horizontal to vertical), and doesn't require any modifications to your car. Output level adjustment adjusts CD level to match your radio, so there's no annoying volume jump when you switch between the two.