Description: MAX9814 is a inexpensive and high-performance microphone amplifier Add an ear to your project with this electret microphone amplifier with AGC Designed for amplifying electret microphone where audio'loudness isn't predictable Microphone amplifier module is a step , with built in automatic gain control Great for you to record or detect audio in a setting where levels change Specification: Supply Voltage: 2.7v-5.5v @ 3mA current Output: 2Vpp on 1.25V bias Frequency Response: 20Hz - 20 KHz Programmable Attack and Release Ratio Automatic gain, selectable max from 40dB, 50dB or 60dB Low Input-Referred Noise Density of 30nV/ Low THD: 0.04% (typ) Size: Approx. 26x19x9mm/1.02x0.75x0.35inch Package Includes: 1 piece Microphone Amplifier Module 1 piece Pin Header Note: Please allow 1-3mm differs due to manual measurement Due to the different display and different light, the picture may not reflect the actual color of the item. Thanks for your understanding