A 2x2 microphone preamplifier, with powerful function and compatibility, and a high-speed USB2.0 interface and 24 Bit / 192 Khz audio resolution, can provides perfect recording quality, very suitable for Mic, guitar, bass, computers and other equipment recording. Specifications: MIC INPUT 1-2 (balanced): Frequency response: -1/-1 dB, 20 Hz-20 kHz Dynamic range: 82 dB, A weighting Maximum input level: '6 dBu Input resistance: 4 kΩ Gain range: '3 dB- '60dB HI-Z INPUT 2 (Unbalanced) Maximum input level: '3.0 dBV Input resistance: 1 MΩ Gain range: 0dB to '40 dB LINE INPUT 1/2 (balance) Maximum input level: ' 10 dBu Input resistance: 18.5 kΩ Gain range: -10 dB - '40 dB MAIN OUTPUT (Impedance balance): Frequency response: -1 / -1 dB, 20 Hz - 20 kHz Dynamic range: 82 dB, A weighting Maximum input level: ' 6 dBu Input resistance 100 kΩ Mobilephones: Maximum input level: 15 mW ' 15 mW, 40Ω USB: Technical specifications: full speedUSB 2.0, 24-bit, 44.1kHz/48kHz/88.2kHz/96kHz/176.4kHz/192kHz XLR INPUT: Polarity: 1 Grounding 2: Hot wire (') 3: Cold wire (one) Power requirements: > 5W Main color: black Item size: 180 * 118 * 48mm / 7.1 * 4.6 * 1.9in Package size: 230 * 138 * 55mm / 9.1 * 5.4 * 2.2in Package weight: 600g / 1.3lb Packing List: 1 * Sound Card