iRig Keys I/O Specifications Microphone Input: balanced female 3-pin, XLR. Pin 2: hot / Pin 3: cold / Pin 1: ground Microphone Input Level: from 6 mVpp to 1.4 Vpp Microphone Input Impedance: 3.2 kOhms Gain Range: 46 dB Phantom Power: +48V ± 4V Frequency Response: 20 Hz - 20 kHz +/-1.5dB Input Noise: -100 dB RMS Instrument Input Instrument Input: unbalanced, Hi-Z, TS 1/4 Jack, Tip: signal / Shield: ground Instrument Input Level: from 30 mVpp to 6.9 Vpp Instrument Input Impedance: 1 MOhms Gain Range: 27 dB Frequency Response: 20 Hz - 20 kHz +/-1.5dB Input Noise: -100 dB RMS Line Outputs: 2x balanced, TRS 1/4? Jack, Tip: hot / Ring: cold / Shield: ground Floating Balanced Outputs with automatic level compensation when working in unbalanced mode Maximum Output Level: +13 dBu into 600 Ohms balanced load Frequency Response: from 10 Hz to 21 kHz (+/- 0.2dB) Output Dynamic Range: 102 dB(A) Output Impedance: 150 Ohms balanced Connector: 1/8" TRS Jack. Tip: right / Ring: left / Shield: ground Headphone Level Power 100mW into 50 Ohms DC barrel: 1x DC barrel. For power and device charging. Device Connector: mini-DIN External Pedal Input: 1/4" TRS Jack Conversion: 16 or 24-bit A/D - D/A Sampling Rate: 44.1 kHz, 48 kHz, 88.2 kHz and 96 kHz USB bus powered when used with a computer  Battery powered (4xAA included) when used with an iOS device  DC power supply (not included, iRig PSU 3A sold separately)* Keys: 25 full-size keys with velocity 8 velocity-sensitive multi color assignable pads Slider strips for pitch and modulation (user programmable) Octave, program change and transport 5 programmable touch sensitive encoders Package includes iRig Keys I/O 25 keyboard Lightning to Mini-DIN connection cable (60cm/23.62") USB to Mini-DI