Plug-in device amplifies tach signal from CCCI ignition system which would otherwise not drive a typical aftermarket tachometer. 3 wires in, 3 wires out. Simple installation. Common uses include interfacing VDO or OEM tachometers. Can also be used to amplify a digital (Hall Effect) speedometer signal. Designed to operate from 5 to 15 volts DC.
Price is $32.95
Install instructions found HERE