Garmin Index Sleep Monitor

The Index™ Sleep Monitor is a lightweight, upper-arm wearable that tracks sleep and recovery metrics, as well as women’s health data, providing up to 7 nights of battery life.

• The description claims the device can track sleep score, sleep stages, HRV, and duration of rest.
• The description claims the breathing variations feature uses Pulse Ox but notes it is not a medical device.
• The description claims advanced women’s health tracking provides insights into menstrual cycles.