An electronic 6 volt regulator is offered, which replaces the mechanical charge regulator in the BOSCH alternator. It fits in the place of the old mechanical regulator without any changes in the alternator, the charging voltage is adjustable. You will receive the controller with precise installation instructions, the controller is set for normal lead-acid batteries/yellow lead-acid batteries, for a conversion to 12V, the controller is also available in a 12 volt version - please inquire. Own production for almost 20 years now - no cheap goods, no cheap imports !!!! Our controllers are often copied - but the quality is never equaled, with the original you are always well served. Since we have both an Ebay shop, a mail order business and an internet shop, it can happen that the stated max.