Garmin HRM Dual heart rate monitor Breast Bluetooth/ANT+ Black

Heart rate data transfer: Bluetooth/ANT+ | Waterproof up to: 10 m | Height: 11 mm | Waterproof: Yes | Operating temperature (T-T): 23 - 12 °C | Adjustable strap: Yes | Number of batteries supported: 1 | Product colour: Black | Measuring type: Breast | Depth: 34 mm | Battery type: CR2032 | Battery voltage: 3 V | Storage temperature (T-T): -5 - 50 °C | Bluetooth version: 5.0 | Battery life: 3.5 year(s) | Chest strap: Yes | Weight: 54.4 g | Width: 62 mm | Strap adjustment range: 63.5 - 132 cm | Bluetooth range: 3 m