Garmin Index Sleep Monitor, Smart Sleep Band with Advanced Sleep Tracking and Recovery Metrics, S-M

Worn on the upper arm, this lightweight and breathable smart sleep band is available in two sizes for comfort throughout the night Can provide sleep-tracking metrics, including sleep score, sleep stages, HRV and duration of rest (data presented is intended to be a close estimation of metrics tracked) Up to 7 nights of battery life For more insight into your health, the breathing variations feature uses Pulse Ox to check your level of variations while sleeping (this is not a medical device and not intended for diagnosing or monitoring medical conditions; Pulse Ox is required and not available in all countries)