Garmin heart rate monitor! Used only a few times. Retail price: 19,800 yen Brand: Garmin (GARMIN) Size (L x W x D): 60.0 - 142.0 x 3.0 x 1.2 cm Weight: 52 g [Main Body Specifications] Module size: 29.6 x 53.7 x 8.6 mm Size adjustment: Fold-over Size range: 60.0-106.0 cm Battery type: CR2032 Battery door: No tools required for opening and closing Battery life: Approximately 12 months (when training for 1 hour a day) Waterproof rating: 5 ATM Operating temperature range: 0°C ~ 40°C Wireless frequency/protocol: 2.4 GHz ANT wireless communication protocol, Bluetooth wireless technology 5.0 Number of Bluetooth Low Energy devices that can be connected simultaneously: 3 Number of ANT devices that can be connected simultaneously: Unlimited Range: 3 m System compatibility: ANT+, Bluetooth [Other] ANT+ heart rate: Yes BLE heart rate: Yes Heart rate variability and advanced heart rate features: Yes ANT+ running dynamics: Yes Standalone activity monitoring (steps, all-day heart rate, calories, weekly exercise): Yes TrueUp: Yes Heart rate storage and transfer: Yes Heart rate statistics for swim intervals: Yes Running pace and distance: Yes