High Definition Sound Hear and be heard when it matters most! Whether you're on a phone call through your computer or video meeting, when wearing the D713U, you'll upgrade your audio for crystal clear voice. Also, a noise canceling microphone will help reduce unwanted background noise, so calleres focus on your voice and not what's going on around you. All day comfort Adjustable ear hook, and 3 ear tips to choose from for a custom fit. All day comfort Included is 3 ear gel sizes (S, M, L) so you can choose one that best fits your ear for all day comfort. Adjustable ear hook Swiveling ball joint ear hook contours to your ear.Adjustable ear hook clamp allows you to choose a position best for your ear.Can wear the ear hook on your left or right ear. Noise-canceling microphone The D713U microphone reduces unwanted background distractions by focusing on your voice when you speak, not the noises happening around you. It also uses an electret condensor microphone! The same used in professional audio equipment, so you can trust you'll be heard crisp. Low profile The D713U is a headset option that provides the same quality as traditional headsets, but with a more low-profile design. For those who don't prefer headsets due to appearance or discomfort, this is one of your best alternative options.