Buzzer 12V 10 EGP Buzzer 3 V 10 EGP Digital Output I2S MEMS Microphone - SPH0645LM4H 480 EGP Electret Microphone Amplifier - MAX9814 with Auto Gain Control 290 EGP INMP441 MEMS Microphone - I2S 350 EGP MAX98357 I2S 3W Class D Amplifier Audio Decoder Module 90 EGP