Voltage control Module used to adjust voltage from 14.8v to 16.0v. This connects to All high output alternators using the GM 3 pin voltage regulators (denso) using diodes off sense wire (no more with this controller). This is a Voltage control knob supplied with a digital voltage meter. Comes with: Controller WITH KNOB,  8 foot harness with 3 pin Harness attached and instructions. Controller ONLY comes in BLACK, so do not select any color option. NOTE: DO NOT EXCEED 16V (CONTROLLER PEAKS AT 16.8V).  DO NOT USE FOR LEAD ACID OR AGM BATTERIES.  IF YOU ARE NOT SURE OF HOW TO USE, DO NOT ORDER.

CONTROLLER WARRANTY IS 30 DAYS