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 is more, 3.5mm Audio Jack or JST 2.0 Speaker Out are both available for audio output.

NOTE: This product does not include the Pi Zero board

Technicial Specifications:

• Compatible with Raspberry Pi (Support Raspberry Pi Zero, Raspberry Pi 1 B +, Raspberry Pi 2 B, Raspberry Pi 3 B and Raspberry Pi 3B +)
  
• With double microphone
  
• 2 Grove Interface: Supports GPIO and I2C
  
• Programmable Button and 3 LEDs
  
• Stereo Codec with Class D Speaker Driver
  
• Two types of audio output sockets: 3.5mm Audio Jack (40mW output), JST2.0 Speaker Output (provides 1W to 8 Ses load)
  
• Remote field support (up to 3 meters)
  
• Dimensions: 65mm x30mm x15mm
  
• Weight: 33g

Technical Documents:

• ReSpeaker 2 wiki
• Get started with Google Assistant
• How to use button to trigger Google Assistant
• Build Your Own Amazon Echo Using a RPI and ReSpeaker HAT
• Related Sofeware on Github