Watch SE 3 Features: Track the quality of your sleep with sleep score. And get sleep apnoea notifications Now with wrist temperature sensing to give you richer health insights in the Vitals app Enjoy all-day, 18-hour battery life. Then recharge up to 2x as quickly with new fast charging Stay active with a range of workout types and motivating metrics With a mobile plan, you can call and text without your iPhone. Now available with 5G speeds Safety features including Emergency SOS, Fall Detection and Crash Detection Specifications: Material and Finish Aluminium case Starlight, Midnight Straps Rubber Solo Loop Neon Yellow, Anchor Blue, Green Grey, Black, Light Blush Sport Band Neon Yellow, Anchor Blue, Purple Fog, Midnight, Starlight, Stone Grey, Light Blush, Pride Edition, Black Unity - Unity Bloom Nike Sport Band Midnight Black, Alpenglow Pink, Blue Ribbon, Veiled Grey, Volt Splash Textile Sport Loop Neon Yellow, Anchor Blue, Purple Fog, Forest, Dark Grey, Pride Edition, Black Unity – Unity Rhythm Magnetic Link Caramel, Sage Grey, Navy Modern Buckle Caramel, Sage Grey, Midnight Purple Braided Solo Loop Turmeric, Neon Yellow, Anchor Blue, Green Grey, Midnight, Pride Edition, Black Unity Nike Sport Loop Midnight Black, Alpenglow Pink, Blue Ribbon, Veiled Grey, Volt Splash Stainless Steel Milanese Loop Natural, Gold, Slate Link Bracelet Natural, Gold, Slate Strap size Sport Band S/M Strap fits 130-180mm wrists. M/L Strap fits 150-200mm wrists. Nike Sport Band S/M Strap fits 130-180mm wrists. M/L Strap fits 150-200mm wrists. Magnetic Link S/M Strap fits 130–160mm wrists. M/L Strap fits 140–180mm wrists. Modern Buckle Small Strap fits 135–150mm wrists. Medium Strap fits 145–165mm wrists. Large Strap fits 160–180mm wrists. Size and Weight 44 millimetres Height: 44mm Width: 38mm Depth: 10.7mm 368x448 pixels 977 sq mm display area Weight (GPS): 32.9 grams Weight (GPS + Cellular): 33.0 grams Fits 140–245mm wrists 40 millimetres Height: 40mm Width: 34mm Depth: 10.7mm 324x394 pixels 759 sq mm display area Weight (GPS): 26.3 grams Weight (GPS + Cellular): 26.4 grams Fits 130–200mm wrists Hardware and Buttons Digital Crown Microphone Side button Speaker / air vent Optical heart sensor Controls Digital Crown with haptic feedback Side button Double tap and wrist flick gestures Faster on-device Siri Chip S10 chip with 64‑bit dual core processor 4‑core Neural Engine 64GB capacity Sensors Second-generation optical heart sensor Temperature sensor Compass Always-on altimeter High-g accelerometer High dynamic range gyroscope Ambient light sensor Health and Wellness Cycle Tracking app with retrospective ovulation estimates Heart Rate app High and low heart rate notifications Irregular rhythm notifications Medications app Mindfulness app Noise app Sleep app including sleep stages Sleep score Sleep apnoea notifications Display Always-On Retina display with OLED and LTPO Tough Ion-X front glass with 4x crack resistance Up to 1,000 nits peak brightness 2 nits minimum brightness 326 pixels per inch Audio Speaker Microphone Media playback Power and Battery Life All‑day battery life, up to 18 hours of normal use Up to 32 hours in Low Power Mode Built‑in rechargeable lithium‑ion battery Fast‑charge capable Up to 80% charge in about 45 minutes 15 minutes for up to 8 hours of normal use 8 minutes for up to 8 hours of sleep tracking Operating System watchOS watchOS is the world’s most advanced wearable operating system, with apps and features designed to keep you active, healthy, safe and connected. Workouts and Activity Running Custom workouts Customisable Workout Views Training Load Heart Rate Zones Race Route Pacer Stride Length, Ground Contact Time and Vertical Oscillation Automatic track detection Multisport workout Hiking Compass with bearing, incline, elevation and coordinates Custom waypoints Automatically generated waypoints to cellular connectivity Backtrack GPS data Offline maps with custom route creation Topographic maps for thousands of national and regional parks (US only) Hundreds of curated hikes across all 63 US national parks Cycling Average speed, elevation gained and distance Connection to cycling accessories via Bluetooth Functional Threshold Power Power Zones Cadence Live Activity on iPhone Swimming Pool swim or open water swim Custom workouts for pool swims Splits and auto sets SWOLF score Automatic stroke detection Kickboard detection Average pace, total distance and lengths More Workouts Skiing Snowboarding Outdoor Rowing Paddling Golf Walk Elliptical Rowing Machine Stair Stepper HIIT Yoga Functional Strength Training Dance Cooldown Core Training Pilates Tai Chi Wheelchair Kickboxing Multisport Other Safety Emergency SOS International emergency calling Crash Detection Fall Detection Noise monitoring Backtrack Durability Water resistance 50m (swimproof) Connectivity L1 GPS, GNSS, Galileo and QZSS 5G and LTE Wi-Fi 4 (802.11n) Support for 2.4GHz Wi‑Fi networks Bluetooth 5.3 Apple Pay GymKit Support for Apple Watch For Your Kids Accessibility Built‑in accessibility features supporting vision, mobility, hearing and cognitive disabilities. Features include: VoiceOver Zoom On/Off Labels Reduce Transparency Increase Contrast Colour Filters Text Size Bold Text Reduce Motion Hourly Chimes AssistiveTouch Button Click Speed Touch Accommodations Auto-Answer Calls Type to Siri RTT Support Audio Volume Balance Auto Transcription Live Speech Accessibility Shortcut Mono Audio Taptic Time Personal Voice Live Listen Environmental Requirements Operating temperature: 0° to 35° C (32° to 95° F) Non-operating storage temperature: –20° to 45° C (–4° to 113° F) Relative humidity: 5% to 90% non‑condensing Operating altitude: 0 to 3,000 metres (0 to 10,000 feet) Apple Watch and the Environment Materials Apple Watch SE 3 is made with 40% recycled content, including: 100% recycled aluminium in the case 100% recycled cobalt and 95% recycled lithium in the battery 100% recycled rare earth elements in all magnets 100% recycled gold plating and tin solder in all Apple‑designed printed circuit boards 100% recycled tungsten in the Taptic Engine 40% recycled glass in the display glass Energy 100% of manufacturing electricity for Apple Watch SE 3 is sourced from renewable electricity 100% of expected customer energy use matched with low-carbon electricity Meets California Energy Commission’s energy efficiency standards for battery charger systems Packaging 100% fibre-based packaging Apple Watch SE 3 packaging is designed to be compact, enabling 40% more units per trip compared to Apple Watch SE Waste No established final assembly sites generate waste sent to landfill as part of Apple’s Zero Waste Programme