Both Jabra and Plantronics have wireless headsets that will work with your phone. If you wish to roam around the office while using the wireless headset you'll need to get the remote lifter accessory. For Jabra wireless it is the RHL-1000 and for Plantronics it is the HL-10.
If you have a newer phone with EHS - Electronic Hookswitch feature download the EHS Guide see select the appropriate EHS adapter for your phone. If your telephone does NOT have EHS capabilities the video below will show you how to properly setup and troubleshoot it if you have problems during setup. See video demonstration below.