The Scosche RHYTHM+™ Armband Heart Rate Monitor comfortably straps to your forearm to monitor blood flow and more accurately track heart rate, calories burned, distance, pace & more throughout your workouts. This fully wireless device has Bluetooth Smart and ANT+ capabilities, allowing it to connect with smartphones, sport watches and exercise equipment. Use any one of over 200 fitness APPs with RHYTHM+ to manage your workout metrics and train harder & smarter. Workout continuously with up to 8 hours of rechargeable battery life. It’s waterproof & sweat proof, has up to a 100 ft. range and comes in a variety of stylish armband colors.