Polar OH1 optical heart rate sensor tracks heart rate from the arm and makes heart rate tracking easier than ever. It’s a great alternative for heart rate chest straps. It attaches to your arm with a comfortable textile armband and measures heart rate with Polar’s high-quality optical heart rate solution.

• Lightweight, nonintrusive optical heart rate sensor with a 6 LED solution for sensitive and accurate readings
• Pair it with your favorite smart phone, iPhone or Galaxy app, your Polar watch or other training device or broadcast your heart rate data in a group environment
• ANT+ connectivity for cycling computers or other compatible gym equipment
• Works with all Polar BLE devices, Polar Beat and many other fitness apps
• Built-in memory (4 MB, 150-200h of training time)
• Waterproof (30 m)
• Machine-washable textile armband
• Lets you enjoy 12 hours of operating time on its rechargeable battery.
• Updatable firmware that enhances its functionality