Track your heart rate in real time with the iFIT SmartBeat monitor. Worn on your upper arm or forearm, it uses optical PPG tech to give you accurate heart rate readings as you move. It syncs seamlessly with the iFIT app and compatible equipment using Bluetooth. Whether you're aiming for fat burn or peak performance, SmartBeat helps you hit your target heart rate zone so you can train smarter - not harder.Good to know- The rechargeable battery keeps going for up to 30 hours between charges- It comes with a magnetic charging cable so it's easy to power up and get back to it- The adjustable, non-slip band fits comfortably on your upper arm or forearm and is designed to stay put