It provides highly accurate heart rate and HRV data to compatible Garmin smartwatches and cycling computers, equipment, and apps. Dial in your running with running dynamics, including step speed loss to understand how much you slow down when your foot hits the ground (with a compatible smartwatch). HRM 600 is easily adjustable and available in two sizes so it’s comfortable to wear during any sport. And when you can’t wear a watch, you can record your activity on the heart rate monitor and sync data, including heart rate, calories, speed, distance and more, directly to the Garmin Connect app. After pushing hard, easily remove the module and throw the strap in the wash. HRM 600 has up to 2 months of battery life with a rechargeable battery.Connectivity HRM 600 sends accurate real-time heart rate and HRV data to your compatible Garmin smartwatches and Edge® bike computers, compatible fitness equipment, the Tacx Training™ app and other apps. Expanded Running Dynamics Improve your running form with running dynamics, including step speed loss1 to understand how much you slow down when your foot hits the ground, in addition to vertical oscillation and ground contact time and balance (requires compatible smartwatch). Activity Recording During activities where you can’t wear a watch, such as team sports or martial arts, the HRM 600 heart rate monitor will record your workout and sync data — including heart rate, calories, speed, distance and more — directly to the Garmin Connect app. Activity Tracking HRM 600 tracks daily metrics, including steps, heart rate, calories burned and intensity minutes, and syncs that data directly to the Garmin Connect app to update on all your devices. Training Versatility For indoor track and treadmill runs, the HRM 600 heart rate monitor sends pace and distance to your compatible smartwatch. And during swim activities, HRM 600 stores your heart rate data and forwards it to your compatible smartwatch2 when your activity is saved. Functional And Durable The LED light lets you know when the HRM 600 is awake and ready to go — or when the battery is running low. With the button, easily wake and pair your heart rate monitor. Plus, HRM 600 is durable with a 5 ATM water rating. SPECIFICATION:GeneralSizing: XS-S: 22"–28" (56–72 cm) Fits chest size 23.5-33.5”M-XL: 28"–42" (72–106 cm) Fits chest size 31.5-47”Water rating: 5 ATM Unit weight: XS-S: 1.9 oz (54 g)M-XL: 2.2 oz (61 g)Module only: 0.6 oz (18 g) Module size: 2.7" W x 1.2" H x 0.4" D (68 mm x 31.6 mm x 10 mm)Range: 3 metres Battery type: Rechargeable (Garmin proprietary plug charger) Battery life: Up to 2 months (1 hour per day) Running Dynamics: Yes (including step speed loss) Concurrent connections: BLUETOOTH Low Energy: 3 ANT: Unlimited