The Iriver on is a Bluetooth audio headset with earbuds that measure different vital signs, such as heart rate and maximum oxygen absorption, while simultaneously providing high sound quality. A new type of sensor in the earbuds measures the blood supply in the capillaries. The data can be accessed via an app on the connected device. The headset features an ergonomically shaped, padded neckband that allows the wearer to engage in extreme sports without any limitations. All music and monitoring functions can be controlled comfortably via the neckband.