Features: CX1000BM is a small serial port controlled voice playback module, which supports MP3 and WAV decoding formats. Support DC3.3~5.2V wide voltages power supply, directly drive 4~8Ω speakers, output power to 5W. Support memory card and USB flash drive. Support for customized auditory files, suitable for many scene applications. With 5W class D amplifiered, which can directly drive 3W~5W speakers. Support UART asynchronous serial port control, and support functions such as playing, pause, up and down music, voice increase and decrease, selected music playing, specified playing, and specified inserting. Specifications: Power supply DC3.3~5.2V , 3.7V and above recommended Support MP3 and WAV decoding formats Sampling to 48KHz With 5W class D amplifiered, which can directly drive 3W~5W speakers. Support Tmemory card, Within 32G capacity, in FAT32 format Standard stamp holes with a spacing of 2.54mm for easy mounting Package Type： A: CX1000B Chip 1cm/0.39in B：CX1000BM Module 23x28mm/0.91x1.1in C：CX1000BM Module Pined； D: CX1000BM Module With horn and CX340 Set Package Includes: 1PC CX1000B Chip/ 1Set CX1000BM Module Optional note: Due to the problemsof lighting effect there will be tolerances in product, please understand. Please allow 0-1cm error due to manual measurement