Sound ID 510 Stereo Bluetooth Headset with EarPrint App for Apple iPhone 4, iPhone 3GS and iPhone 3G in Retail Packaging - Apple Recommended The worlds first Bluetooth Headset with its own iPhone App. Made and Designed for Apple iPhone 4, iPhone 3GS and iPhone 3G Devices. EarPrint App - Personalize your sound preferences and settings with the first ever iPhone App for Bluetooth headsets. Touch Sensor Volume - No more fumbling around to adjust the volume  you're in control with just a touch of your finger on the headset. 3X NoiseNavigation - 3 sensitive microphones eliminate wind and background noise from both ends of your call. Includes a Blue CCMaccessories Neck Strap / Lanyard.