Stainless steel case Sapphire crystal Retina display with Force Touch Ceramic back Heart rate sensor, accelerometer, and gyroscope Ambient light sensor Speaker and microphone Wi-Fi (802.11 b/g/n 2.4 GHz) Bluetooth 4.0 As much as 18 hours of battery life * Water resistant ** ** Apple Watch is splash and water resistant but not waterproof. You can, for example, wear and utilize Apple Watch throughout exercise, in the rain, and while cleaning your hands, but immersing Apple Watch is not advised. Apple Watch has a water resistance ranking of IPX7 under IEC basic 60529. Functions undergo alter and may not be offered in all regions or all languages. Needs iPhone 5 or later.
Ion-X glass; Retina display with Force Touch
Heart rate sensor, accelerometer, and gyroscope
Wi-Fi (802.11b/g/n 2.4GHz); Bluetooth 4.0