Yurbuds Focus LE Limited Edition Wireless Behind The Ear BT Headphones, Black Twistlock technology provides a secure fit that is guaranteed not to fall out even during the most demanding physical activities Stereo Bluetooth connectivity allows you to wirelessly connect to your favorite music Integrated control and microphone give you full control of your music and calls Sweat and water resistant design ensures that the headphones endure through rain, water and sweat Flexsoft Comfort Fit tips are ergonomically designed for long-lasting comfort