The 6ALN has a built-in Rev Control. These rev controls are adjustable with plug-in modules and will save your engine from over-rev damage caused by missed shifts or driveline failure. Features: Multiple spark, capacitive discharge ignition control Supplied with 3,000, 6,000, 7,000 & 8,000 RPM Modules Supplied with rubber shock mounts Programmable for 4, 6, or 8-cylinders by cutting red/blue wire loops 110 millijoules per spark up to 15,000 RPM 470 primary voltage output to coil Accepts breaker points, amplifier and magnetic pickup trigger inputs Works on 12 - 18 volt electrical system Multiple sparks for 20 degrees of crankshaft rotation Built-in Soft Touch Rev Control is adjustable with RPM Modules Clear plastic base plate for easy tech inspection Circuit board is encased in a clear two part silicone elastomer 6-pin Weathertight connector, mandatory for NASCAR use Designed for circle track racing with NASCAR mandated connectors and clear epoxy potting compound for vibration protection