This series contains the 4060, 4061, 4062, 4063 and 4071 Omni Miniature Mics. Each version is tailored towards a specific application based on sensitivity, voltage and placement needs. They are all based on the original 4060; the very first miniature microphone developed by DPA from the best technology previously only used in hearing aids and measurement microphones. All of the mics in the series share important basic features, but each is optimized for particular applications.