Check the listing for details. AccuSpark Black Box IIProgrammable distributor advance and rev-limiter. Condition: New. Listed at 236.68 USD. The Black Box II Programmable ignition Box is so packed with features that it knocks the competition out of the park At last you can easily programme your own existing distributor with any specific ignition curve. Adjust Initial timing with car running and hear engine note change as you adjust. Stand Alone unit, does not require any App, Bluetooth connection or any other deviceWorks on all standard points and aftermarket electronic distributors and conversions.Lucas, Bosch, Motorcraft, Ducellier, Femsa, Marelli AccuSpark, Aldon, Pertronix, Powerspark, Extremely easy to install, requires, power earth and 2 simple connections. Easy setup with Intuitive setup. Pre programmed with default map for easy set up. Program 3 different maps. Live data shows advance and RPM Can be adjusted with car running Adjustable rev limiterPowered from Cactus Ignition software. Totally designed, built programmed and supplied from the UK Your original distributor needs to have its advance lockedThis is a simple process of removing and using lock wire to wire the mechanical advance closed.