The ACM-51B is a high output microphone for personal computers. PRODUCT FEATURES: PCvoiceLINK technology for compatibility with all sound cards; Omni-directional microphone; Adjustable Microphone Arm; Sensitivity: 60dBV / Microbar; Microphone Power Voltage: 1.5v to 10v; Impedance: 2000 Ohms; Frequency Response: 100-16,000 Hz; 7' shielded cord; 3.5mm plug.