1. Support MP3 and WAV decoding formats. 2. Support sampling rate (KHz): 8/11.025/12/16/22.05/24/32/44.1/48. 3. 24-bit output, dynamic range support 90dB, signal-to-noise ratio support 85dB. 4. Fully support FAT16/FAT32 file system, maximum support for 32G TF card. 5. Comes with 5W class D power amplifier, can directly drive 4Ω, 3~5W speakers. UART serial port control voice broadcast function, can control playback, pause, song selection, volume addition and subtraction, etc., the largest selection of 65,535 songs, baud rate of 9600bit / s. Support IO trigger playback function, 8 IO ports trigger 8 tracks or 8 IO ports to trigger 255 tracks. Support One_line single bus serial port control, can control playback, pause, song selection, volume addition and subtraction and other functions. Support 3 configuration IO for up to 7 working mode selection, dial switch settings are simple. Module interface and function definition and high quality Model: DY-SV5W Dimensions: 4x4cm/1.57x1.57inch color:Blue Material:plastic Package Contents: 2 x Voice Playback Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.