It has 16 timers that can be independently paused and restarted, and can run forward or backward.
There are 16 alarms with configurable sounds and actions.
Timers can show Earth, Mars, Jupiter, etc. times at the same time.
How about sidereal time, Moon phase, Jupiter's Great Red Spot transit time, and anything periodic in general?
Avtanski provides comprehensive building instructions at the link.
Link via Make | Previously: What Time Is It in Mars?