Seiko Ruputer First Smartwatch
Long before the Apple Watch and any Google Wear OS devices, there was Seiko’s Ruputer. This smartwatch was released in 1998 and features a 16-bit, 3.6 MHz processor, 2 MB of non-volatile storage memory, 128 KB of RAM as well as a 102×64 pixel monochrome LCD. Other features include an 8-direction joystick, 6 function buttons, a serial interface and an IR port for communicating with other devices. Read more for two videos and additional information.

The main body measures around 2 inches wide, 1 1/8 inches across, and 5/8 of an inch deep, all powered by two lithium CR2025 button cell batteries, which supply it with enough power for approximately 30 hours of use. Under normal usage, the watch goes into standby mode if left idle to extend its battery life. It was also bundled with a software development kit to enable programmers to create new software written in the programming language C.

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