Our all-new Holley Easy Level(TM) Fuel Level Sender uses LiDAR technology to precisely measure the depth of fuel remaining in your tank and works with all Classic Instruments' fuel gauges, including our short-sweep, full-sweep, and selectable ohm range fuel gauges. It also works with many other gauge brands and any liquid. This model is compatible with tanks ranging from 4-to-39-inches. Setup is a breeze with the on-board buttons. Easily set empty and full tank position with reserve, then set the empty, half, full position on the gauge. The desired dampening rate (how fast or slow the gauge reacts) is adjusted with dip switches right on the unit (reduces fuel slosh and gauge bounce), plus the necessary screws and gasket for installation are included. Besides the problems encountered with float setup, hitting baffles or tank wall, this eliminates having to set up the float type sender so saves time and effort. Upgrade your gauge sets to capture the benefits of LiDAR technology LiDAR is an acronym for "light detection and ranging" or "laser imaging, detection, and ranging". LiDAR technology has been around for years, but this innovative automotive application is exciting because it replaces several moving parts with a hi-tech laser. Instruction sheet included for Classic Instruments and other standard gauges Additional instruction sheet listed below for AutoMeter applications Max operating temperature of 185 degrees