Features and Benefits:Switches from 2 cycle to 4 cycleHeavy duty ABS/Polycarbonate shockproof housing, molded boots, built in hand guard for protectionDetachable 6 foot leads with metal inductive pickupPatented Skip Circuitry Test up to 9,990 RPMOne hand operation Four function digital readout and easy to read backlit LCD:Tachometer: 249 to 9,990 RPMAdvance degrees (2 and 4 cycle): 0 degree to 90 degreesDwell: 0 degrees to 180 degrees / 2-12 cylinderVoltage: 10 to 16 volts Includes molded plastic storage case. Features and Benefits: Switches from 2 cycle to 4 cycleHeavy duty ABS/Polycarbonate shockproof housing, molded boots, built in hand guard for protectionDetachable 6 foot leads with metal inductive pickupPatented Skip Circuitry Test up to 9,990 RPMOne hand operation