This module allows you to recalibrate most 95-06 OEM electronic speedometers when changing tire size, pulley, or final gearing. Easy installation - simply plugs in between the pickup sensor and the stock wiring harness. Allows small step corrections of less than 1 mph. Correction range of 50% to 200%. No power required to maintain calibration when the bike is parked. Two sealed buttons allow easy resetting of the speedometer reading while the bike is in motion. A must for custom builders using electronic speedometers.This item fits the following vehicle applications:compatible with Harley Davidson FLHR Road King 1996-2006compatible with Harley Davidson FLHRCI Road King Classic 1998-2006compatible with Harley Davidson FLHRI Road King 2000-2006compatible with Harley Davidson FLHRI Road King 1996-1997compatible with Harley Davidson FLHRSI Road King Custom 2004-2006compatible with Harley Davidson FLHT Electra Glide Standard 1996-2006compatible with Harley Davidson FLHTC Electra Glide Classic 1996-2005compatible with Harley Davidson FLHTCI Electra Glide Classic 1996-2006compatible with Harley Davidson FLHTCU Electra Glide Ultra Classic 1996-1997compatible with Harley Davidson FLHTCUI Electra Glide Ultra Classic 1996-2006compatible with Harley Davidson FLHTI Electra Glide Standard 2003-2006compatible with Harley Davidson FLST Heritage Softail 2006compatible with Harley Davidson FLSTC Heritage Softail Classic 1996-2006compatible with Harley Davidson FLSTCI Heritage Softail Classic 2001-2006compatible with Harley Davidson FLSTF Fat Boy 1996-2006compatible with Harley Davidson FLSTFI Fat Boy 2001-2006compatible with Harley Davidson FLSTI Heritage Softail 2006compatible with Harley Davidson FLSTN Heritage Softail Special 1996compatible with Harley Davidson FLSTN Softail Deluxe 2005-2006compatible with Harley Davidson FLSTNI Softail Deluxe 2005-2006compatible wit