Heart Rate Monitor for Garmin HRM-Dual GPS Tracker 010-12883-00 Properties: Heart rate data transmission: Bluetooth/ANT+ Waist adjustment range: 63.5 - 132 cm Measurement type: Chest Adjustable strap: Yes Product color: Black Waterproof up to: 10 m Bluetooth range: 3 m Bluetooth version: 5.0 Temperature range (operation): 23 - 12 °C Waterproof: Yes Power Supported battery type: CR2032 Battery life: 3.5 years Battery voltage: 3V Number of batteries supported: 1 Weight and dimensions Product height: 11 mm Product width: 62 mm Product depth: 34 mm Product weight: 54.4 g Working conditions Temperature range (storage): -5 - 50 °C Package contents Chest strap: Yes