A smartwatch is a computerized wristwatch with functionality that is enhanced beyond
timekeeping . While early models can perform basic tasks, such as calculations , translations, and game-playing , modern smartwatches are effectively wearable computers . Many run
mobile apps, using a mobile operating system .
Some smartwatches function as portable media players , offering playback of FM radio, audio, and video files to the user via a Bluetooth or USB headset. Some models, also called 'watch phones', feature full mobile phone capability, and can make or answer phone calls. [1][2][3]
Internal hardware is various. Most have a
rechargeable battery and graphical display and many have a touch screen. Peripheral devices may include camera , thermometer,
accelerometer , altimeter , barometer , compass ,
GPS receiver , speaker and SDcard that is recognized as a mass storage device by a
computer . Software may include Map display ,
scheduler and personal organizer , calculator , and various kinds of watch face . The watch may communicate with external devices such as sensors, a wireless headset, or a heads-up display .
Like other computers , a smartwatch may collect information from internal or external sensors. It may control, or retrieve data from, other instruments or computers. It may support wireless technologies like Bluetooth, Wi-Fi , and
GPS . For many purposes, a "wristwatch computer" simply serves as a front end for a remote system, communicating by various radio technologies.
Smartwatches are advancing, especially their user interfaces and health related applications.