It's fantastic and classic at the same time. It is in fact with illumination through nixie tubes, also known as cold cathode displays, a technology that the world wrote off long ago in favor of digital, that has kept the project alive through years of iterations and design processes. Coalescing the complex mechanics of watch design and engineering, the elegance and usability of product design, and the sheer radiance of its enchanting visual and light design, SPARK is a wearable device that may not be smart but has oodles of old-world charm, an unsubtle blend of an industrial aesthetic and eye-catching neon.
VIDEO is for IN-16 but the features are the same. Include vintage NIXIE tubes, soldered board, faux leather straps. Straps can be changed with any other. The end link spring bars lengths are 24mm.Display hours, minutes (12 or 24 hours format optional). Delays between values can be adjusted.
Seconds can be reset to zeros. Display date (DD/MM, MM/DD) (can be turned off).Display temperature (Celsius or Fahrenheit) (can be turned off). Visual effects (can be turned off). The first tube can be disabled in a value lower than 10.
Backlight LEDs can be adjusted to 8 colors and also help to navigate the menu. Display battery (Li-ion 3.7V) 2000 button pressings and over 30 days in standby mode. Simple time setting using one button or remote control.
Tubes are driven in high-frequency dynamical indication and provide service for many years. All settings are stored in non-volatile memory.
Charge: DC 5V and micro-USB plug (Power cord and adapter are NOT INCLUDED). Time accuracy (+/- 1 second per month) is provided by built-in RTC (Real Time Clock) based on an extremely precise DS3231 module with temperature compensation. Not AC frequency dependent - works in all countries. The power cord and power supply are NOT INCLUDED! Any micro-USB cord (usually used for smartphones) can be used and also any free USB port.