- MXL AC-44 White USB Boundary Microphone; 3 capsule boundary design with 180-degree coverage; USB-C (for PC / Mac); Compatible with USB 2.0 and 1.1; 3,5mm analog output (for recording and headphone); Frequency Response: 30Hz - 20kHz; Sampling Rate: 48kHz; A/D converter: 16-bit Delta Sigma with THD+N - 0.01%; Power: over USB; Material: metal and plastic; Dimensions (W x H x D): 78 mm x 25 mm x 65 mm; Weight: 125 g; Color: white; Including Connection cable USB Mini-B (for microphone) to USB A (for PC)