Thank You! This helped me solve a big problem for a customer: Putting a tachometer on a 1949 Farmall tractor with a 6-Volt positive ground electrical system and a Magneto ignition system. Required some creative electronics, but this part was a key component. - Bob W

Installed it on Skyline GC110. After installing the Accel300+ ignition, the tachometer stopped working. However, this product solved that problem. It's a very good product. They also provided thorough after-sales follow-up. - Akio C

I am running the new, ‘Plus’ series Spal brushless fans on a 1970 TorinoCobra. Just wired the controller like the directions say and programmed it, easy peasy. Now I can adjust the on/full speed features of my fans. Excellent!!!!! AAAA+++ PS, the device is super small will fit anywhere. - Gray K