JPL Explore Monaural Cordless Headset is a totally unique Patented DECT desk phone. Users can enhance their desk phone by combining a Bluetooth or USB connection and have the option to change from monaural headband to binaural headband. The headset has been upgraded to include enhanced software for better compatibility and sound, new headband design with padded headband cushion, larger ear cushions, and swivel speaker housing for all day wearing comfort, as well as a longer microphone boom arm to further enhance the Surround Shield noise cancellation. It is a modular system that gives you the option for multiple combinations.