MSD offers these Power Grid 7 ignition boxes as part of the Power Grid 7 ignition system. These ignition boxes pack higher output than other current programmable units. When used with the Power Grid 7 system controller, these USB-compatible boxes offer advanced programming for ultimate control over your rpm and timing. They provide five retard stages for nitrous and four steps of rpm limits for burnouts, spool, launch, and overrev. MSD Power Grid 7 ignition boxes' output switch can be set on rpm, pressure, or time. Power Grid 7 ignition boxes have shift light settings for each gear, and the ignition data acquisition accepts multiple runs.