The Innova 3568 top-of-the line timing light is ideal for the selective do-it-yourselfer. Includes a split-screen digital LCD readout displays with tachometer and advance functions showing simultaneously. Product Features:Digital Tach: 249 to 9,990 RPMDigital Advance: 0 to 90 degreesSlim, rotating barrel for better aim at timing markDetachable leads, metal inductive pickupProtective hand guardOne-hand operationPatented skip circuitry test up to 9,990 RPMBuilt-in hand guard provides protection from moving parts in the engine bay