This adapter converts a 11 pin headset jack to a 3.5mm jack. The cable is approximately 4 inches long and allows you to plug in any stereo device that has a standard 3.5mm audio jack, such as your favorite pair of headphones. The HTC 3.5mm Mini USB Stereo Headset Adapter allows you to connect your HTC PDA phone to any 3.5mm headphone. Enjoy listening to your favorite music using any standard 3.5mm stereo headphone. Just plug in your favorite stereo headphones to the HTC 3.5mm Mini USB Stereo Headset Adapter and you"re ready to go! Perfect for custom car stereo setups, the HTC 3.5mm Mini USB Stereo Headset Adapter will plug into any 3.5mm jack including desktop speakers, home theater systems, etc. Compatible with:T-Mobile G1, T-Mobile myTouch 3G, T-Mobile myTouch 3G (3.5mm Edition), T-Mobile myTouch 3G Fender Limited EditionAT&T Tilt 8925HTC P4550 TiltHTC TYTN II, T-Mobile Shadow 2009Verizon Wireless HTC Ozone XV6175Sprint HTC Snap S511, HTC Snap S522, HTC Touch Pro 2 (T-Mobile), HTC Touch Pro 2 (Sprint), HTC Touch Pro 2 (Verizon Wireless), HTC Touch Diamond 2, HTC Touch Pro 2 (GSM), AT&T HTC Tilt 2, HTC Hero (GSM), Sprint Hero, HTC Pure, HTC Droid ErisT-Mobile Dash 3G, Verizon HTC Imagio*Note: Audio function only. This adapter does not provide data and power connections.