Samsung Galaxy Watch 6 Classic SM-R965F 43mm LTE NFC Smart Watch Fitness Silver

And now you can access Sleep Coaching on your Galaxy Watch6 Classic to build better sleeping habits. Get a good night's sleep when wearing your watch to bed by switching to the Fabric Band. Be sure to put your watch on sleep mode to change the PPG sensor's green LED to invisible infrared LED, dim the display brightness and mute notifications.

eBay