Top Dawg Sport Behind the Head Headset has a comfortable behind the head design. Sweat proof makes this headset great for exercising or an active lifestyle. With high quality audio and awesome bass, this headset also has the CVC echo and noise reduction. With the multi-point, you can connect to 2 devices. You can make and receive calls and display battery level on the iPhone. Up to 25 hours talk time and 600 hours standby.