Did you know that listening to music while working out can enhance your performance by at least 20%. Denon has developed the ultimate wireless fitness headphones that are your perfect training companion. Sweat proof, featuring stereo Bluetooth® 3.0 wireless connectivity, and an integrated amplifier professionally tuned to energise your workout. Completing the package is a seven hour rechargeable battery and integrated controls and microphones for on-the-go use, meaning the Denon's Exercise Freak AH-W150 In-Ear Headphones keep the music going without getting in the way of your work out. Avoid using headphones with the volume turned up for an extended period of time. Doing so can damage your hearing. It is advisable to keep the volume at a moderate level at all times. For your own safety, do not use when driving or cycling.