Apple Watch SE second generation - 40 mm

Features GPS systems (L1 signal) and GLONASS and Galileo and QZSS Compass Always-on altimeter Water resistance up to 50 meters depth 2nd generation optical heart rate sensor Emergency calls worldwide 3 emergency SOS Acceleration measurement up to 256 g force with fall detection and collision detection features Gyroscope with high dynamic range Ambient light sensor Speaker Microphone Apple Pay GymKit 32GB storage Nylon composite back cover and sapphire crystal Display 44mm 368 × 448 pixels Display area 977 mm squared 40mm 324 × 394 pixels Display area 759 mm squared LTPO technology Retina OLED screen Brightness level up to 1000 nits per square meter Power Built-in rechargeable lithium-ion battery Up to 18 hours 5 magnetic USB-C charging cable