WEMOS D1 Mini compatible ESP8266 Active Buzzer Shield
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This shield is an active buzzer, producing a loud alarm sound of about 1-3kHz.
It will be activated with a HIGH level on one of the pins D5-D8 (selectable).
The kit includes male and female standard connectors as well as “long lead” stackable headers.
Specification: WEMOS D1 Mini compatible ESP8266 Active Buzzer Shield