Used a few times. Operation confirmed. Registered with Studio One Artist, so the serial number cannot be used. Please be aware of this. Instant purchase is available. The PreSonus STUDIO 24c is a compact audio interface with XLR/TRS combo input jacks and TRS output jacks. - Brand: PreSonus - Model: STUDIO 24c - Input Terminals: XLR/TRS combo input jacks - Output Terminals: TRS output jacks - Accessories: Instruction manual, cable - Color: Black/Blue PreSonus' 24-bit 192kHz audio/MIDI interface Studio series is newly released as the "Studio USB-C series." High-quality music production environment realized both mobile and home studio. It can be connected directly to PC/smartphone/tablet, and of course, it also supports USB 2.0.