The Coros Heart Rate Monitor is the sports watch brand’s first attempt to branch out and make its own heart rate monitor. It’s opted to move that monitoring to the arm (specifically the bicep), for those who find chest straps uncomfortable to wear, but still want a level of accuracy that outperforms tracking heart rate from the wrist. It uses Bluetooth to connect to your Apple smartwatch and has a built-in battery, which will cover plenty of workout time before you need to grab a charger.
