In Line Volume Control 3.5mm Plugin

This iPhone adapter has a standard 3.5 mm stereo female connector on one end and a standard 3.5 mm male connector on the other end. This allows you to connect to any form of a plugin that has either the old-school eighth-inch connection or into any of the various adaptors for the newer generation iPhones. For Bluetooth users, you can use this to plug into an external Bluetooth device and pair that to your phone and use this as the volume control.