Watch Small Eslpod Product Mathematical User Braille Move

A simple watch "merely" (only; just) tells the time, but "specialty watches" have additional "features" (characteristics that make a product more attractive to buyers) and "functionality" (the things that a product can do).

A "calculator watch" is a watch with a very small "numeric keypad" (keys for typing the numbers 0-9 plus some mathematical symbols) that allows the user to "perform mathematical operations" (solve math problems) on his or her wrist.

A "braille watch" is a watch for "blind people" (people who cannot see). An "analog" (with hands that move in a circle) braille watch allows a blind person to "tell the time" (determine what time it is) by feeling the hands. A "digital" (electronic) braille watch has small bumps that move up and down so that a blind person can use his or her fingertips to read the "braille alphabet" (a system of writing that uses raised dots in specific patterns to represent letters and numbers).

A "solar-powered" watch "is powered by" (receives power from) sunlight, so that "theoretically" (in theory or as an idea) it always works without being charged and without needing to change the battery as long as it is exposed to sunshine "periodically" (sometimes, but not continuously; from time to time).

A "navigation watch" uses "GPS" (global positioning system; a system that communicates with satellites to determine location) to display a small map on the screen. The user can enter a "destination" (where one wants to go), and the watch will "indicate" (tell or show) how to get there.

Finally, some "smart watches" are "fully integrated with" (work in harmony with) smartphones. For example, smart watches can be used to send and receive text messages, emails, and even phone calls.