Make sure this Fits by entering your model Number. Compatibility: devices with a 3.5mm or 2.5mm jack audio port: computers (PC/Mac), smartphones and tablets, iOS and Android. Desk phones with audio jack. Comfortable and sturdy, with Retractable headband. The binaural Headset features Full stereo output rather than the standard output of a telephone Headset. Noise canceling microphone - flexible boom arm microphone. Both monaural (zum350m)and binaural versions (ZUM350B) available. The zum350 headsets are designed specifically for mobile phones, tablets and computers, and the large installed base of desk phone-handsets with 2.5 and 3.5 mm audio jack Headset ports. Combined with a noise canceling microphone, they deliver high quality audio. The 40mm speaker provides a powerful sound output. Both 3.5mm and 2.5 mm audio jack pins are included for universal compatibility.