CMEJ Omnidirectional Electret Condenser Microphone CUI Devices CMEJ Omnidirectional Electret Condenser Microphones feature diameters as compact as 4mm and depths as low as 1.3mm. The cost-effective series offers a sensitivity range of -42dB to -25dB and a noise ratio signal range of 60dBA to 70dBA. These omnidirectional modules are available in four termination types: solder pad, pin, surface mount, and wire lead. CUI Devices CMEJ Microphones are ideal for use in household electronics, medical devices, and industrial applications.