Features: CX1000AM is a small serial port controlled voice playback modulewhich supports MP3 and WAV decoding formats. DC3.3~5.2V wide voltages power supply, directly drive 4~8Ω speakers Output power of 5W Onboards 32Mbits(4MBytes)flash storage and support Auditory file 48KHz Connection to the computer through USB data cable to replace Auditory files, suitable for many scene applications. Standard stamp holes with a spacing of 2.54mm for easy mounting. Support functions such as playing, pause, up and down music, sound increase and decrease,switching, selected music playing, specified playing, and specified inserting. Specifications: Power supply; 3.3-5.2V , 3.7V and above recommended. Support MP3 and WAV decoding formats Sampling rate up to 48KHz. Support UART asynchronous serial port control With：5W class D power amplifiering, drive 3W-5W speakers With 32bits (4Mbytes) flash storage Can be connection to the computer through USB Cable to change Auditory files Size:about 28x23mm/1.1x0.91in Pakcage：A/B/C/D A：CX1000A Chip B：CX1000AM Module C：CX1000AM Module Welding Pin D：CX1000AM Module+CX340+Loudspeaker+Cable Package Includes: 1PC Auditory Development Board note: Due to problem of lighting effect, there might be tolerances in product, please understand. Please allow 1cm errors due to measurement.