ZST - Zeus Speedometer Technology
Zeus Speedometer Technology (ZST) gives you the first self-diagnostic speedometer and has the simplest calibration procedure. With new instant calibration, drive 30 mph and push the button. Done! The tachometer works with 1-12 cylinder engines and has an optional shift light. Any known speed signal is accepted. ZST has four pending patents.
Hot Rod Alley/22486