ITEM NAME:Sound Sensor Module Sound Detecting Device C6W8 Sound Sensor Module Sound Detecting Device C6W8 Features: high sensitivity electret condenser miniphone (ECM) sensor Power indicator light Comparator output indicator light AO, real-time miniphone voltage signal output DO, high/ low electrical signal output Analog quantity output Threshold rollover electric Level sensitivity adjustable via potentiometer Power supply: 3-15 V DC Hole inner diameter: approx. 3 mm Size (L x W): approx. 36 x 16 mm package content: 1 x Sound Sensor Module Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm..Threshold rollover electric. Power indicator light. Comparator output indicator light. Features: high sensitivity electret condenser miniphone (ECM) sensor. Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.