What type of headset will work with the DuraFon-UHF handset? EnGenius Updated January 31, 2017 18:37 Follow The connector on the handset is M1 (2.5mm). Related articles Can you program each line on UHF/PRO/SIP handset to a specific extension? Durafon UHF FAQ Which EnGenius phone systems does the DuraFon-UHF handset work with? How do I disable the CTCSS/DCS tone on the Durafon-UHF? What impedance is the headset jack on the DuraFon? Comments 0 comments Please sign in to leave a comment.