Viper/Clifford Two-Way Engine Starter Models: 5906V (5906x), 5706V (5706x), and 5606V (5606x) - This is the main unit 5x06. This is a manufacturer-refurbished item that has been tested for functionality. It can also be used with 5904V (590.4x) and 5704V (570.4x). This is a limited quantity item, as the main unit is not usually sold separately. Includes our original detailed Japanese wiring and setup manual, 19 pages in A4 size. Harnesses are also available separately.