Use: The Tech 21 SansAmp PSA 2.0 has been used on thousands of major releases, worldwide tours Instruments: The Tech 21 SansAmp PSA 2.0 works with multiple applications and instruments including guitar, bass, horns, vocals, and drums Flexibility: The SansAmp PSA 2.0 provides the flexibility to find almost any conceivable personality within the vintage and modern guitar and bass amplifier sound spectrums, as well as an assortment of revered stompboxes Easy To Use: You dont need any special training or a degree in physics to operate your unit 128 Memory Locations: With 128 memory locations, storing and recalling programs is simple