Garmin Index Sleep MonitorThe Garmin Index Sleep Monitor: Comfortable upper arm wearable sleep monitor that tracks detailed sleep stages (REM, light, deep), sleep score, breathing variations, heart rate, and HRV without needing to wear a watch to bed. Battery lasts up to 7 days. Syncs to Garmin Connect. Key Features Genuine Garmin OEM: Direct from manufacturer product backed by Garmin's full warranty and software ecosystem Watch Free Sleep Tracking: Comfortable upper arm
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