Sierra 18-9913 Smartach Diesel Gasoline Tachometer Measures from 200 to 9,999 RPM, .05 accuracy Measures RPM for any engine equipped with an alternator Not affected by engine vibrations No complicated setup, simply connect to the battery or cigarette lighter plug Includes hard shell carrying case Large 4 12 digit LCD display California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type Special Tools Product MPN 18-9913 Product UPC 808282373955