Me Sound Sensor is designed to detect the intensity of sound in the surrounding environment. You can use it in sound interative project such as a voice operated switch or build a dancing robot with music. Based on the power amplifier LM386 and the electret microphone, it can output analog values ranging from 0 to 1023. Due to a potentiometer, you can adjust the sensitivity according to different situations. Features: * Detect the intensity of sound in the surrounding environment * Selectable sensitivity with a potentiometer * A state indicator and a power indicator * 16mm interval M4 mounting holes, compatible with Makeblock beams * 2.54mmbreakout pins for connecting with jumper wires * Easy wiring with 6 Pin RJ25 interface Specification: * RatedVoltage: 5V * Signal type: Analog(A0 pin output about 483(quiet), from 483 to 1023(noise)), A1 pin output about 0(quiet), from 0 to 1024(noise). The sensitivity of A0 pin is higher than A1 pin. * Size:24x48x 32mm(Length x Width x Height)"