Galaxy Watch 4 40mm Smartwatch 

Lte Connectivity: Call, Text And Stream Without Your Phone. (Lte Service Required) Get Ready To Crush Your Wellness Goals With Body Readings Right On Your Wrist Better Sleep Starts Here: Wake Up Feeling Refreshed And Recharged With Advanced Sleep Tracking; When You Go To Bed, Your Galaxy Watch4 Sleep Tracker Starts Monitoring Your Sleep And Spo2 Levels Continuously