[Great if you can't stand earbuds] It sits outside your ear instead of in your ear canal. This Bluetooth headset is ergonomically designed to stay in place better than earbuds when you're on the treadmill. It's also comfortable to wear with glasses. It doesn't ore your ears like earbuds do.[Very Light and Small] These headphones are light enough that you won't even notice them while running, which makes running easier to shuffle through my music. I've worn them at the gym and back-packing with these over-ear headphones. They fit easily in my pocket. They can be worn on a pillow or under a hat on my head.[Easy to Control Music and Calls] The over-ear headphones have 4 control buttons instead of two like the in-ear ones. The right earbud has controls for answering calls, raising or lowering the volume, and skipping forward or back a bit. Each button has a raised dot but is easy to navigate if you take a minute to rest your finger on the dial. Experience true hands-free calling and enjoy your music anytime, anywhere. With stereo calls, the call quality sounds like you're holding your phone.[Extends usable battery life] The behind-the-ear Bluetooth earphones arrive fully charged and ready to use out of the box. Use for hours a day, charge on Monday, and the battery lasts a week.[Perfect earphones for running] Running and sharing the path with other people/bikes. You want to hear them approaching from behind. Small wireless Bluetooth earphones add to the fun of running on hot summer days. You may also like the fact that sound control is easier when your main focus is on running, making it an ideal Bluetooth earphone for sports.