Stay Connected Send a text, take a call, listen to music and podcasts, use Siri or call for help with Emergency SOS. Apple Watch SE (GPS) works with your iPhone or Wi-Fi to keep you connected. Health and Safety features Get insights into your health, including notifications if you have an irregular heart rhythm or an unusually high or low heart rate.Get help when you need it with Fall Detection,1 Crash Detection and Emergency SOS.Automatically notify loved ones when you arrive at your destination with Check In. Simply Compatible It works seamlessly with your Apple devices and services.Unlock your Mac automatically. Find your devices easily. Pay and send money with Apple Pay. Swimproof and Fashionable 50m water resistance. Three finishes. And a colour-matched back case made with a production process that reduces its carbon emissions. Easily customisable With watch bands in a range of styles, materials, and colors and fully customizable watch faces, you can change your watch to fit your mood or the moment. Carbon Neutral Apple Watch SE (2nd generation) is carbon neutral when paired with selected straps. Learn more about Apple’s commitment to the environment at apple.com/2030. Specifications Product: Apple Watch SE GPS 40mm Starlight Aluminium Case with Lake Green Sport Loop Watch Series: SE (2nd gen) Wireless: Wi-Fi; Bluetooth 5.0 Watch body: Starlight Aluminium Case Band type: Sport Loop Band size: S/M 130-180mm Band colour: Lake Green Chip: S8 SiP with 64-bit dual-core processor Display technology: Retina LTPO OLED display Display resolution: 324 x 394 pixels Display: Touchscreen; Up to 1,000 nits brightness Battery: Built-in rechargeable lithium-ion battery Weight: 26.4 g Operating system installed: WatchOS 11 Water resistance rating: Water Resistance: 50 m Buttons and Connectors Digital Crown with haptic feedback Side button Siri Sensors Second-generation optical heart sensor High-g accelerometer Up to 256 g-forces with Fall Detection and Crash Detection High dynamic range gyroscope Ambient light sensor