Adapter converts the phone"s own audio output into universal 3.5mm output * 3.5mm output means unlimited possibilities of device to broadcast the audio sound/music from your phone * Adapter allows connection to any 3.5mm stereo headset and portable speaker * Adapter also allows your phone/PDA to connect to any home stereo system [Note: May require additional RCA Y-Cable]. NOTE: For audio / music output ONLY, audio input not available: Mic on the cell phone headset will not work with this adapter. * NOTE: Audio adapter WITHOUT built-in microphone. For audio / music output ONLY, audio input not available: Mic on the cell phone headset will not work with this adapter. Cable Length: ~ 4.25 in / ~10.8 cm. Color: Black.