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ReSpeaker 2-Mics Pi HAT Description: ReSpeaker 2-Mics Pi HAT is a dual-microphone expansion board for Raspberry Pi designed for AI and voice applications. This means that you can build a more powerful and flexible voice product that integrates Amazon Alexa Voice Service, Google Assistant, and so on. The board is developed based on WM8960, a low power stereo codec. There are 2 microphones on both sides of the board for collecting sounds and it also provides 3 APA102 RGB LEDs, 1 User Button and 2 on-board Grove interfaces for expanding your applications. What's more, 3.5mm Audio Jack or JST 2 Speaker Out are both available for audio output. Tip! : This product is fully compatible with Raspberry Pi 4 (1GB, 2GB, 4GB) Features: Raspberry Pi compatible (Support Raspberry Pi Zero, Raspberry Pi 1B+, Raspberry Pi 2B, Raspberry Pi 3B, Raspberry Pi 3B+ and Raspberry Pi 4 ) Dual-Microphones 2 Grove Interfaces: support GPIO and I2C Programmable Button and LED: one button and three LEDs Stereo Codec with Class D Speaker Driver Two types audio output socket : 3.5mm Audio Jack(40mW output ), JST2 Speaker Out(providing 1W into 8Ω loads) Far field support (up to 3 meters) Technical details: Dimensions: 65mm x 30mm x 15mm Weight: GW 33g