The Polar OH1 is an armband with an optical oscilloscope that combines flexibility, comfort and simplicity. It fits snugly on your arm and records your heart rate with Polar’s high-precision optical heart rate monitoring solution. With Polar OH1, nothing can stand in your way and your goals. Technical Characteristics Weight: Sensor: 5g armband: 12g Height: 9.5 mm Diameter: 29.85 mm Compatible with iOS devices, with Bluetooth 4.0 and Android 4.4 or later. Internal memory: 4 MB, up to 200 hours of training Battery: 45 mAh rechargeable lithium battery Waterproof up to 30 meters
