4pcs Max9814 -microphone Amplifier,automatic Gain Control for Arduino

Supply voltage: 2.7V-5.5V @ 3mA currentOutput: 2 Vpp in 1.25 V bias.Frequency response: 20 Hz-20 KHz.For MAX9814 Microphone.Description:1. Supply voltage: 2.7v-5.5v @ 3mA current.2. Output: 2 Vpp in 1.25 V bias.3. Frequency response: 20 Hz - 20 KHz.4. Programmable attack and release ratio5. Automatic gain, GAIN: Three-state amplifier gain control: GAIN = VDD, the gain is set to 40DB; GAIN = GND, the gain is set to 50DB; GAIN = floating, the gain is set to 60DB6. Low input referred noise density of 30 nV7. Low THD: 0.04% (typical)colour: purpleMaterial: PCBPackage Contents:4 x Amplifier board modulesOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.