The guitar appears to be a normal Hagström Swede but the neck is specially wired to transmit an input to a synthesizer when the strings come in contact with the frets.

In April of that year Hagström received from Ampeg the first electronic circuits to be put inside the body of the guitar.

The result very much resembled the standard Hagström hardware, except that the centers of the saddles were made of a dense plastic, and instead of a single tailpiece the strings terminated at separate blocks set in 2 rows.

A total of 498 right hand models were produced from 1976 to 1979, with the vast majority being sold to Leo's Music, Don Weir and Guitar Center in the Bay Area and Los Angeles.

Additionally a small run of Swede and Fender Jazz bass guitars were equipped with the Patch 2000 system.