DollaTek trademark Reg.NO:013726393 Description: Automatic Gain Control (AGC). Three Gain Settings (40dB, 50dB, 60dB). Programmable Attack Time. Programmable Attack and Release Ratio. 2.7V to 5.5V Supply Voltage Range. Low Input-Referred Noise Density of 30nV/. Low THD: 0.04% (typ). Low-Power Shutdown Mode. Internal Low-Noise Microphone Bias, 2V. Available in the Space-Saving, 14-Pin TDFN (3mm x 3mm) Package. -40°C to +85°C Extended Temperature Range. Size：26*14*8mm(L*W*H). Weight:2.0g. Applications/Uses： Bluetooth Headsets、Digital Still Cameras、Digital Video Cameras、Entertainment Systems (e.g. Karaoke)、High-Quality Portable Recorders.IP Phones/Telephone Conferencing、PDAs、Two-Way Communicators . Pack include: 1x DollaTek MAX9814 Electret MIC Microphone Amplifier Module Auto Gain Control for Arduino