Autometer Ultimate Playback Tachometers Have Helped Drag Racers Trip The Win Lights For Decades By Providing The Necessary Data To Protect Engines Fine Tune And Diagnose Clutch And Converter Strategies Nail Shift Points And Improve Launch Consistency. The Ultimate Dl Expands Upon The Ultimate Iii Design Adding Even More Critical Performance Data To Your Analysis Toolbox (7 Channels In Total). Built Around Autometers Responsive Competition Grade Movements The Ultimate Dl Tracks The Fastest Revving Engines With 0-11K Rpm Sweep Time Of Just 333 Milliseconds. 30% Lighter Than The Ultimate Ii Designs Which They Replace Ultimate Dl Tachometers Still Come Packed With Features. Record And Playback Up To 4 Runs (60 Sec. Ea.) Worth Of Engine And Driveshaft Rpm Data Lateral Longitudinal And Vertical G Forces Air/Fuel Ratio And A Pressure Channel Of Your Choice Or Download High Resolution (100 Hz) Data To Our Easy To Use Datapro Software For More Advanced Analysis. 4 Stage Shift Light Control Is Standard And A New And Improved Arms (Automatic Recording Memory Start) System Makes For Worry-Free Driver Operation. The Latest Led Technology Provides Superior Visibility Shock And Vibration Resistance While Reducing Power Consumption Requirements And Expanded Cylinder Selection Means They Support More Applications Than Ever Before!