The high-quality microphone preamplifier, AT-MA2, allows for gain adjustment and provides stable sound quality. - Model Name: AT-MA2 - Input Terminals: MIC IN - Output Terminals: LINE OUT - Power Supply: DC 9V - Gain Adjustment: MIN/MAX - Power Indicators: POWER/PEAK - Country of Manufacture: MADE IN CHINA This item is being sold as junk as its functionality has not been confirmed. Thank you for viewing.