The dual 3.5mm jacks allow you to choose which side you prefer to wear your cable on. Using the remote to receive phone calls and control music is a breeze. Click once to answer incoming calls or hang up, as well as play and pause your music. Click twice to fast-forward your music, click three times to go back. This detachable 3.5mm Headphone cord is compatible with Major II, Major II Bluetooth, Mid Bluetooth and Monitor.