MP3 Decoder Module (VS1053) for ArduinoHighly cost-effective ultrasonic distance-measuring sensor that uses active sonar technology to determine distance.Features : VS1053 Decoder chip+5VDC power supplySPI, all signals routed to header pinsAudio output port for headset and speakerOne microphone for recordingOne line-in input interfaceDimension:50mmx40.5mmLibraryAvailable here: VS1053 Library