ITEM NAME:1 x GY-MAX4466 Electret Microphone Amplifier with Adjustable Gain for A IWB KZG Descriptio n Characteristics And Advantages: Power Supply Voltage: +2.4V To+5.5V (Can Be Directly Connected To STM/ARDUNIO/Raspberry Pie And Other Development Board Motherboard) PSRR: 112 DB CMRR: 126dB AVOL: 125dB (RL = 100k) Rail-To-Rail Output Static Power Supply Current: