IK Multimedia iRig Pre HD, Microphone interface for mobile devices and computers, With XLR input, High-quality preamplifier with adjustable gain, High-quality AD / DA conversion with up to 24 bits / 96 kHz, Adjustable stereo headphone output with switchable direct monitoring, Power supply via USB and 2 AA batteries, +48 V, +/- 4 V phantom power, 40 dB gain, Impedance: 2 kOhm, Frequency range (+/- 1.5 dB): 20 - 20,000 Hz, Noise level: -105 dB (A), -97 dB RMS, Headphone output: 3.5 mm stereo jack unbalanced, Power headphone amplifier: 100 mW to 50 ohms, Dimensions: 40 x 110 x 34 mm, Weight: 75 g (without batteries), Incl. USB to Micro-USB adapter cable 0.6 m, 2x 1.5 V AA battery and software package as download via manufacturer / App Store