Designed for convenient hands-free communication, the M18 is a freestanding desk or tabletop model with a flexible boom microphone that can be bent for optimum usage and recording efficiency. The low profile base can easily slide under a keyboard for space efficiency. The omni-directional, electret condenser microphone features an impedance of 2.2k ohm. Designed for use with amplified, computer sound card systems, it requires external power when used with non-bias power (non-amplified) systems.