Hamilton Buhl Personal Headset with Gooseneck Mic and TRRS Plug Features adjustable gooseneck microphone, foam ear cushions, and more! The TRRS plug is the perfect companion to any of your devices. Includes a heavy-duty, write-on, moisture resistant, re-closeable anti-lice storage bag. Adjustable headband Ear Cushions: Replaceable foam ear cushions 27mm Speaker Drivers Frequency response: 50-16,000 Hz Impedance: 32 Sensitivity: 105dB 4dB Input: 100MV Compatible with: iPods, iTouches, MP3 players, iPhones, cell phones, iPads, tablets, eReaders PCs and Macs CD players, stereos TVs Most gaming systems Plug: 3.5mm TRRS plug Cord: 4&#039; Dura-Cord  a chew-resistant, PVC-sleeved, braided cord for long-term durability and reliability Prop 65 Compliant Omnidirectional Steel-reinforced gooseneck microphone Sensitivity: -36dB 3dB Frequency Response: 50-16,000 Hz Impedance: 2,200