The Apple Watch is a fully functioning, customizable device that will help you with your everyday life. The Apple Watch 7 comes in two sizes, a 38mm and a 42mm. It is designed to be a wearable and is compatible with iOS and watchOS. The device has an accelerometer, gyroscope, and an altimeter. It also comes with GPS for navigation and a barometer to monitor the weather. It has a built-in heart rate monitor, accelerometer, gyroscope, and altimeter. It has Wi-Fi and Bluetooth capabilities. The Apple Watch 7 also has a rechargeable lithium-ion battery with a life of 18 hours.