Choose your model of Smartwatch:
Apple Watch (Original & Series 1) Button
This is the external button cover for a 38 mm or 42 mm Apple Watch Original model or Series 1 model. It does not include the internal electronic switch.
A smartwatch is a computerized wristwatch with functionality enhanced beyond timekeeping, often with features comparable to a PDA.
It is a wrist worn timepiece that does more than just tell the time. It has an operating system and can run apps. It may also include GPS, Bluetooth connectivity, WiFi capability and more.