The innovative Mio Link Heart Rate Wrist Band makes use of a cutting edge electro-optical cell which senses blood under the skin to deliver reliable heart rate data without the need for a chest strap. To help you get the most out of your workouts, the wristband features up to 5 customizable heart rate zones, so you can tailor your exercise to get the best results, combine this Bluetooth and ANT+ technology which allows you to connect to your favourite apps such as Strava and you bike computer, the Mio Link Heart Rate Wrist Band is perfect for on the go athletes looking for a performance driven yet affordable wristband.