Apple Watch SE 3 [GPS 40mm] Smartwatch with Starlight Case with Starlight Sport Band. Fitness and Sleep Trackers, Heart Rate Monitor, Always-On Display, Water-Resistant, M/LHEALTH ESSENTIALSTemperature sensing enables richer insights in the Vitals app and retrospective ovulation estimates. Youll also get a daily sleep score, sleep apnea notifications, and be alerted if you have a high or low heart rate or an irregular rhythm. GREAT BATTERY LIFEEnjoy all day, 18 hour battery life. Then charge up to twice as fast as SE 2 and get up to 8 hours of battery in just 15 minutes. ALWAYS ON DISPLAYNow you can read the time and see