ReSpeaker 4-Mic Array AI Voice Quad-microphone Expansion Board for Raspberry Pi 4B

Features 1 Raspberry Pi compatible Support Raspberry Pi 4B 3B 3B ZeroW Zero1 3 2 4 Microphones3 3 meters radius voice capture4 2 Grove Interfaces5 12 APA102 User LEDs6 Software Algorithm VAD Voice Activity Detection DOA Direction of Arrival and KWS Keyword Search Please note that there are no any audio output interfaces on ReSpeaker 4 Mic Array for Raspberry Pi It is only for voice capture And you could use the headphone jack on Raspberry Pi for audio output Specification  1 Dimensions 65mm x 65mm x 9mm2 Weight G W 20g3 Battery Exclude4 MIC 4 analog microphones5 LED 12 APA102 programable RGB LEDs connected to SPI interface6 Raspberry Pi 40 Pin Headers support Raspberry Pi Zero Raspberry Pi 1 B Raspberry Pi 2 B and Raspberry Pi 3 B7 AC108 highly integrated quad channel ADC with I2S TDM output transition Package list  1 x ReSpeaker 4 Mic Array not include raspberry pi