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https://knowledge.apogeedigital.com/duet-2-specifications
Specifications
Computer connectivity USB 2.0 High Speed
Roundtrip latency 32 samples/96kHz: 3.6 ms; 64 samples/44.1kHz: 5.8 ms
Power USB bus power (DC power optional)
Bit resolution/sample rate 24-bit/44.1-192 kHz
Input channels 2
Output channels 4 (Stereo headphone speaker outs)
Speaker outputs Balanced
Microphone preamps 2
Microphone preamp gain Up to 75dB
Line-level input +4 dBu, -10 dBV
Metering Full-colour OLED
Breakout cable 2 'combi' in, 2 quarter-inch out