CHOOBY J4MSBK JBuds In-Ear Single Earphone Style Headset with Enterprise Class Microphone, Black (Discontinued by Manufacturer) Single (one) earbud rugged handsfree wired headset with mic (different from J4M which has two earbuds) Push button control for answer calls/music control Rugged metal construction with signature 5 durable flex joints and kevlar reinforced cable Compatible with most smartphones, tablets, Android, Windows, BlackBerry, and Apple products with a 3.5mm jack Primarily designed for use with cell phones, two way radios, and other applications such as driving or biking, where only one bud is preferred to leave the other ear open