They are usually powered by a rechargeable lithium-ion battery.
Some use transflective or electronic paper to consume less power. While internal hardware varies, most have an electronic visual display, either a backlit LCD or an OLED.
Some models, called watch phones (or phone watches), have mobile cellular functionality such as making telephone calls. Some smartwatches function as portable media players, with FM radio and playback of digital audio and video files via a Bluetooth headset. While early models could perform basic tasks such as calculations, digital time telling, translations, and game-playing, smartwatches released since 2015 have more general functionality closer to smartphones, including mobile apps, a mobile operating system, and WiFi/Bluetooth connectivity. For the Sony brand, see Sony SmartWatch.Ī smartwatch from around 2005 ( Fossil Wrist PDA)Ī smartwatch is a wearable computer in the form of a watch modern smartwatches provide a local touchscreen interface for daily use, while an associated smartphone app provides management and telemetry, such as long-term biomonitoring. This article is about smartwatches generally.
