Product Review

Workout more efficiently and burn more calories Comfortable armband accurately measures heart rate. No chest strap required Rechargeable battery provides up to 8 hours of workout time Wireless workout from up to 100 ft. away from your device! Compatible With: iPhone 5S iPhone 5C iPhone 5 iPhone 4S iPad mini with retina iPad mini iPad (4th gen) iPad (3rd gen) iPod touch (5th gen) Samsung Galaxy S IV The Rhythm+ Optical Heart Rate monitor & apos; s ANT+ Connection works with Garmin Forerunner, Vivo Fit, Sagunto ambit 3, Vieira, and completely takes the place of your heart rate monitoring chest strap. The Bluetooth 4. 0 connection works with all of the popular fitness tracking apps such as digit, wahoo, starve, map my fitness, endomondo, run keeper, runtastic, ismoothrun, and more!