The PRS Santana III was a model of electric guitar made by PRS Guitars. According to the PRS website, the guitar had a mahogany back, carved maple top, 24 fret, 24½" scale, 10" radius, East Indian rosewood fretboard, abalone bird inlay, Santana wide fat neck carve, PRS Tremolo, 14 to 1, low mass locking tuners, electronics and tremolo cavity cover, new Santana pickups with covers, 3 way toggle pickup selector, volume control and tone control.
The PRS Santana III has been a signature guitar for Carlos Santana. He was one of the very first customers to buy from the new guitar manufacturer, and to this day he uses the same guitar in many of his concerts.
The Santana III is no longer in production.
References
PRS Santana III Wikipedia(Text) CC BY-SA