A smartwatch is a wristwatch with screen and the ability to do much more than tell you the time.They are wearable comuputers,that can run mobile apps, using a mobile operating system. They can be used as portable media players, with FM radio and playback of digital audio and video files via a Bluetooth or USB headset. Some models, also called 'watch phones', feature full mobile phone capability, and can make or answer phone calls or text messages. Smartwatches have an electronic visual display,a rechargeable battery and touchscreen. Peripheral devices include digital cameras, thermometers, accelerometers, altimeters, barometers, compasses, GPS receivers, tiny speakers, and SD card .Software include digital maps, schedulers and personal organizers, calculators, and different watch faces. It supports wireless technologies like Bluetooth, Wi-Fi, and GPS. How do they work?? Watches can cooperate with an app in a smartphone to carry out their functions,for which the...