Made in the USA Electronic Tach that gets the signal from the distributor. Very easy installation, 1 wire to the ign. switch, 1 wire to the coil, and 1 wire to ground. 0 to 3,000 with hour meter. OD is the standard 3-3/8″, designed to drop into your dash. Detailed instructions included. The picture shows a glare, but the face and glass of these tachs are perfect, no imperfections. I’m not a photographer.