Focusrite's Clarett 4Pre USB audio interface offers up to 18 inputs and 8 outputs in a powerful, yet small form factor. Whether you're on the go and recording wherever life takes you, or make this the heart of your studio, there's nothing that can stop this interface from your workflow! Easily access four mic preamplifiers from the front panel that also incorporate Focusrite's Air effect, which give you all the flavor of Focusrite's transformer balanced ISA mic pre with the flick of a switch. If you find yourself looking to expand the amount of inputs, the included ADAT input makes it a breeze to add Focusrite's OctoPre or OctoPre Dynamic for 8 additional inputs. Start recording your hits today with Focusrite! Features and specs: SUPPORTED OPERATING SYSTEMS Compatible with Mac 10.10 onwards and Windows 8.1 onwards SUPPORTED SAMPLE RATES 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz MICROPHONE INPUTS Frequency Response 20 Hz - 35 kHz ± 0.5dB Min Gain Dynamic Range 118 dB A-weighted THD N 0.001% Noise EIN <-128 dB A-weighted Maximum input level 18 dBu at minimum gain Gain Range 57 dB LINE INPUTS 1-4 (VARIABLE GAIN) Frequency Response 20 Hz - 35 kHz ± 0.5dB Min Gain Dynamic Range 118 dB A-weighted THD N 0.001% Maximum input level 26 dBu at minimum gain Gain Range 18 dBu at minimum gain INSTRUMENT INPUTS Frequency Response 20 Hz - 35 kHz ± 0.5dB Min Gain Dynamic Range 117 dB A-weighted THD N 0.001% Maximum input level 14 dBu at minimum gain Gain Range 57 dB LINE & MONITOR OUTPUTS Dynamic Range Outputs 118 dB A-weighted Maximum Output Level (0 dBFS) Balanced Line/TRS Outputs 18 dBu THD N 0.0006% HEADPHONE OUTPUTS Dynamic Range 115 dB A-weighted THD N 0.0003 % > 100R Maximum Output Level