Polar OH1 is a compact and versatile optical heart rate sensor that measures heart rate from your arm or temple. It's a great alternative to chest straps. With Polar OH1, nothing stands between you and your goals.

Features

• High quality 6-LED optical heart rate solution
• Built-in memory that can store up to 200 hours of training data
• Works with Polar Beat, Polar Club and top fitness and training watches
• Compatible with Bluetooth and ANT+ gym equipment, bike computers and sport watches
• Comfortable armband fits snugly, comfortably and discreetly around your arm
• Keeps improving with over-the-air updates
• Water resistant up to 30m
• Rechargeable with up to 12 hours of training time on a single charge
• Dimensions: 29.85mm x 9.5mm