WIDEBAND | 2/4-Stroke Air/Fuel Ratio meter This nice backlighted wideband air/fuel ratio meter will give you precious informations on your engine. It will allow you to tune more precisely your engine. Its warning could even save your engine from bad damages?! Its programmable warning will tell if your engine run too lean or too rich. Specifications (R= Range U=Unit) Air/fuel ratio R: 10 ~ 24 Over LEAN setting R: LEAN 14.8 ~ 24 Over RICH setting R: RICH 14.6 ~ 10 Effective temperature range 14 ~ 140 F (?10 ~ 60 C) Effective voltage DC 12 V Sensor included Bosch oxygen sensor: 28-BOSCH Compatibility 2 stroke or 4 stroke engines ?2 stroke adaptor? BG001855 is mandatory when used on a 2 stroke application Requires a DC 12 V battery absolutely (will not function with our AC/DC converter) Water Proof JIS D 0203 Meter Size W99.6 x L42 x H22.5mm Meter Weight 85g