Apple Watch SE 3 combines essential health, fitness, connectivity and safety features in a lightweight and durable design. Powered by the S10 chip with a 64-bit dual-core processor, 4-core Neural Engine and 64GB of storage, Apple Watch SE 3 delivers smooth everyday performance for apps, workouts, notifications, calls, messages and more.The Always-On Retina OLED display makes important information easy to see at a glance without needing to raise your wrist. It delivers up to 1,000 nits of peak brightness and features tough Ion-X front glass with enhanced crack resistance, making it well suited to everyday wear.Apple Watch SE 3 provides a comprehensive range of health and wellness features. Its second-generation optical heart sensor supports the Heart Rate app, high and low heart rate notifications and irregular rhythm notifications. A temperature sensor enables additional health insights, while sleep tracking includes sleep stages, sleep score and support for sleep apnoea notifications. Advanced Cycle Tracking, Medications, Mindfulness and Noise apps provide further tools for understanding and managing your wellbeing.For fitness, Apple Watch SE 3 can track a wide variety of activities including running, walking, cycling, swimming, HIIT, strength training, yoga, Pilates, rowing and more. Advanced workout features include custom workouts, Heart Rate Zones, Training Load, VO2 max, running power, cadence, stride length and automatic track detection.Built-in GPS provides accurate distance, pace and route information during outdoor activities. GPS + Cellular models also allow compatible mobile network connectivity when away from your iPhone, helping you stay connected for calls, messages and other supported services.Apple Watch SE 3 is swim proof with water resistance to 50 metres. Safety features include Emergency SOS, international emergency calling, Fall Detection, Crash Detection, Check In, noise monitoring and Backtrack.Connectivity includes Wi-Fi, Bluetooth 5.3 and GPS, while Apple Pay allows convenient contactless payments directly from your wrist.The built-in rechargeable lithium-ion battery provides up to 18 hours of normal use or up to 32 hours in Low Power Mode. Fast charging can charge the battery to approximately 80% in around 45 minutes, while a short 15-minute charge can provide up to 8 hours of normal use.S10 chip with 64-bit dual-core processor4-core Neural Engine64GB storage capacityAlways-On Retina OLED displayUp to 1,000 nits peak brightnessTough Ion-X front glassSecond-generation optical heart sensorWrist temperature sensingHeart rate monitoring and notificationsIrregular rhythm notificationsSleep tracking, sleep stages and sleep scoreSleep apnoea notificationsAdvanced Cycle TrackingBuilt-in GPSCompass and always-on altimeterHigh-g accelerometer and gyroscopeWide range of workout and fitness tracking modesEmergency SOSFall Detection and Crash DetectionWater resistant to 50 metresWi-Fi and Bluetooth 5.3Apple PayUp to 18 hours battery lifeUp to 32 hours in Low Power ModeFast-charge capableAluminium case