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Feature:
1. This array expansion board can be used to build for Amazon Alexa voice service, for Google Assistant, etc., with more powerful and flexible voice.
2. The raspberry pie array expansion board contains 12 programmable apa102LEDs.
3. The array expansion board has the ability to do VAD (voice activity detection), evaluate DOA (direction of arrival), and display the direction through the LED.
4. This for Raspberry Pi AI recognition array expansion board can be universal 4B/3B+/3B etc.
5. The array expansion board is easy to install, supports long‑distance, and no longer worry about distance.
Specification:
Item Type: Array Expansion BoardLong-Distance Support: Approx. 3meters / 9.8ft(longest)
Package List:
1 x 4-Mic Array Expansion Board
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