Features air fuel ratio reading, RPM and playback ability to optimize your rides performance The large digits and bright back light makes it easy to read at anytime Easy to operate, compact and lightweight and can be mounted to many applications Automatically activates the heated screen to increase display reaction time in cold weather (14?-140?F) Requires a 12VDC battery Includes LSU 4.9 sensor Can be mounted to many applications including snowmobiles, UTVs and more Compatible with 2-stroke or 4-stroke engines; O2 sensor Bung Adapter is optional when used on a 2-stroke application - sold separately Records: number of records - 50 sessions; recording time approximately 3.18 hours Digital volt meter ranges DC 5 ~ 24 V; flashing numbers settable range DC 8V to DC 18V. GAUGE AIR/FUEL 6FT