Malcom Distributors 2.5mm Female to 3.5mm Male 3 rings Jack Stereo Adapter On/Off enabled - Convert 2.5 mm Stereo Cell Phone Headset to 3.5 mm MP3 Stereo Earpiece Earphones Input Jack for iPhone 1G 3G 3Gs, Blackberry, Motorola Droid, Palm Pixi, HTC Eris Nexus One