ITEM NAME:1X(Knocking Sensor Module Ky-031 K9X6) 1X(Knocking Sensor Module Ky-031 K9X6) 1X(Output: Switching Transducer Type: Vibration Sensor Operating Temperature: -40-85 Celsius Type: Logic ICs Application:Speaker Supply Voltage:1.9-3.6V colour:blue Material:plastic Package Contents: 1*knocking sensor module)