MicroLED is still an emerging technology and is not yet widely used in smartwatches.

AMOLED displays offer a wider color gamut, which means they can display a wider range of colors than LCD displays.

E-ink displays have a slow refresh rate, which means that they are not suitable for displaying moving images or videos.

Rotating bezels are a unique design element found on some smartwatches, but they are not as common as round or square displays or physical buttons.

Rotating bezels are often used to navigate the user interface of a smartwatch, as they provide a convenient way to scroll through menus and select items.

Plastic is not a common material used for smartwatch cases, as it is not as durable as other materials such as stainless steel, aluminum, or ceramic.

Ceramic smartwatch cases are more scratch-resistant than stainless steel cases, which makes them less likely to show signs of wear and tear over time.

Nylon is not a common type of smartwatch strap, as it is not as durable or stylish as other materials such as metal, leather, or rubber.

Metal smartwatch straps are more durable than leather straps, as they are less likely to break or tear.

Barometers are not as common as other features such as heart rate monitors, GPS, or NFC.

Barometers are used to measure air pressure, which can be useful for tracking changes in weather conditions.

Android is not a common operating system used on smartwatches, as it is not optimized for the small screen size and limited processing power of smartwatches.

Wear OS has a larger app ecosystem than Tizen, which means that there are more apps available for Wear OS smartwatches.

Garmin is not as common a brand of smartwatch as Apple, Samsung, or Fitbit.

Fitbit smartwatches are known for their fitness-focused features, such as heart rate monitoring, GPS tracking, and sleep tracking.