Housed in compact packages with diameters as small as 4 mm and depths as low as 1.5 mm, CUI’s waterproof electret condenser microphones are ideally suited for a variety of industrial and outdoor applications where moisture and environmental contaminants are present. The omnidirectional microphones feature ingress protection (IP) ratings up to IP67, sensitivity ratings as low as -42 dB, and signal to noise ratios from 57 dBA up to 70 dBA.