i-Mate 36H00380-00M Stereo 2.5mm Ear Bud Headset with Volume Control - Non-Retail Packaging - Black The Omni-directional Electret condenser microphone lets you speak clearly while the 96dB Dynamic Receiver helps you hear even in noisy rooms Plus, the durable, break-resistant cord is designed to last handy Push-to-Answer Button with volume control right on the cord, you won't even have to touch the phone to answer a call Compatibility: For all phones with a 2. 5mm headset input