This headset has a 2.5 mm jack.
Every home and business needs a dependable telephone. On Time Supplies offers a nice selection of corded and cordless home & office desk phones, including Verizon digital phones and the latest telephone sets from other trusted manufacturers. We also carry Plantronics USB and Bluetooth phone headsets, PC phone headsets with noise canceling mics and other telephone headset styles. Take advantage of fast shipping from On Time Supplies to get your office or home phone and headset in just a day a two. If you need more information on the home and office desk phones and headsets featured at On Time Supplies, or on GSA pricing, call us toll free at 1-866-501-6055. We're happy to answer any supply questions.