This Innovate Motorsports G4 AFR Gauge is designed for use with the patented award-winning LC-1 Wideband Controller. These kits includes the G4 Air-Fuel Ratio Gauge - mounting hardware - CD and quick-start guide. Gauge Only - Accessory for LM-1 - LC-1 - LMA-3 or DL-32 Air-Fuel Ratio Range is 8 to 18 - Wide range Accepts a linear 0-5 volt signal.