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Specifications of USB soundcard: SYSTEM REQUIREMENTS: Compatible with: Windows XP and higher Apple: Mac OS 10.5 and up Connections: Speaker Jack 3.5mm (for headphones or speakers) Operation: Powers from USB port NO BATTERIES! Audio Output: 2 Channel Stereo Compatible Sampling Rates: 48KHz, 44.1KHz, 16KHz, 8KHz Power Supply: Supply Voltage 4.5-5.5 VDC Total Power Consumption: 120 mA A/D Conversion Resolution: 16 bit THD+N: -84 dB Supply Bias Resistor: 2.2K Ohm 3.3VDC Frequency Response: 20-20,000 Hz Additional Boost (Gain): 30 dB Input Range: - 1.25 Vrms Dynamic Range: 95 dB Record Gain Range: -6 to 33 dB D/A Conversion Resolution: 16 bit THD N: -91 dB Output Load: 32 Ohm Output Voltage: 1.27 Vrms