PC Headset Adapter for compatibility with Cisco IP Phones Why buy an expensive headset just for your office phone? Use the Headset Buddy Adapter and your existing computer headset with most VOIP office phones that have a headset jack. A money saver for home businesses, call centers, sales people, or anyone who is on the phone all the time, and wants to use a lower cost or more comfortable PC headset. Specs: This amazing adaptor converts the standard headset 3.5mm mic/audio plugs to a standard RJ9, RJ10, or RJ22 handset plug, allowing you to use your favorite computer/laptop headset with your IP phone. This adapter is designed for use with headsets that have two 3.5 mm. plugs; one for the microphone and one for the headphones/earpiece(s). The adapter outputs binaural sound for stereo headsets, meaning you will hear sound out of both ears. The adapter cable is approximately five inches long. All Headset Buddy products are EU RoHS Compliant. Example Compatible with Phones for PC Headset to IP Phone Adapter: This list is not all inclusive. Please look up the specifications on your specific phone to see if it has a RJ9, RJ10, or RJ22 headset jack. If the Headset Buddy doesn't work with a model on this list we will be happy to refund 100% of your purchase plus pay for return shipping. IP phone headset jack for models: 7931G, 7940, 7941G, 7942G, 7945G, 7960, 7961, 7961G, 7962G, 7965G, 7970, 7971, 7971G, 7975, 7975G, 7975G, 7965G, 7945G, 7962G, 7942G Incompatible with Polycom, Nortel, Aastra, and other phones. Will not work with the handset jack or an RJ11 jack (wall jack). Incompatible with phones:Cisco 7902, 7905, 7910, 7911, 7912, 7920, 7921, 7961