product description Overview Onboard audio power amplifier LM386 Audio signal gain up to 200 Analog output adjustable voltage amplitude Signal output indicator Product specifications Power: 3.3V ~ 5.3V Size: 39.0mm * 21.0mm Mounting hole size: 2.0mm application Environmental sound detection Sound level detection product information Product size 7.1 x 3.9 x 3.5 inches Product weight 0.32 ounces
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