Introducing the world's first smart watch Casio F-91W

 Speaking of smart watches, it has received widespread attention in recent years. From brands such as Samsung, Apple, and Sony, to brands such as Huawei and Xiaomi. All target this market! But what is the world's first smartwatch?

    What is the world's first smart watch? Casio F-91W is definitely one of the alternative answers. The watch released 25 years ago with a battery life of up to 7 years still has many advantages to learn from.

    This once ubiquitous watch fully deserves the title of "smart watch". Today, our most basic requirement for smart watches is nothing more than the ability to push information and notifications on the mobile phone, which can display a variety of dials and have strong battery life. Look at the F-91W of the "Ancient Era", except that it cannot push information Notice, all other aspects meet the requirements.

Casio F-91W was released in 1991. In that year, the world's first GSM digital network appeared. Smart phones were still a product more than ten years later. The digital age of mobile communications has just begun. This watch is still on sale now. Although Casio has not announced the F-91W sales data for a long time, it is no exaggeration to say that it is the best-selling watch in history.

    F-91W has rich functions and strong recognition, bringing accurate digital timing to almost every corner of the world. F-91W is equipped with a large LCD screen, so its main screen can display a lot of information-in addition to the twelve or twenty-four hour clock accurate to the second, it can also display the date and weather. And the indicator light for alarm clock and hourly hour. F-91W uses an all-plastic body and a resin strap, and weighs only 22 grams. Wearing such a light weight on the wrist only feels a little tight, basically it is not felt.

    F-91W is equipped with a single LED light that can light up the entire screen. However, it is not evenly distributed (F-105W uniform backlight with electroluminescence), but it is enough to light up all the elements on the LCD screen.

The lighting and screen switching are all done by the classic Cassie European three-buttons. On the bottom left is the mode button, which controls the switching between the main time interface, alarm setting interface, stopwatch interface and time setting interface. The buttons on the bottom right control the selection of options on each interface, and the buttons on the upper left control the selection of each option. In use, the operation interface of F-91W does not have a help option, so if you want to switch modes and home screen proficiently, muscle memory is required. Once you have all the operations in your mind, it is easy to get started, and over time you will find that all operations are so natural.

    The stopwatch is a major feature of the F-91W, so many runners choose the lightweight F-91W as a sports timer. When the stopwatch is running, the word count data is displayed on the screen, and the total time is displayed in the background for review, which is also a major advantage.

    Casio equips the standard version of F-91W with waterproof function. Unfortunately, it can only protect against rain during daily use. It cannot be worn for bathing or swimming.

Although the F-91W cannot play Flappy Bird, it also has its own game like a modern smartwatch. With its timekeeping of 1/100 second, you can copy Roy Scheider in the movie "Blue Thunder" (Blue Thunder) The mental game of "stop the timer at exactly one minute without looking at the screen" in.

    Finally, take a look at the most important feature of this watch-battery life. Apple is still working hard to provide 24 hours of battery life for the Apple Watch. Some Android Wear watches claim that it can reach two days, and Pebble predicts that its battery life of up to seven days will be the biggest selling point. What is the battery life of the Casio F-91W? It's not 7 days or 7 weeks, but a terrifying 7 years! And it's still under normal use of alarm clocks and LED lights.

    Twenty-five years after being on the market, Casio F-91W is already one of the most critical digital products of the 20th century. And it is still on sale in the 21st century, and it proves to the world that the great design and practical functions are still not outdated today.