Support MP3, WAV decoding format. Support sampling rate (KHz): 8/11.025/12/16/22.05/24/32/44.1/48. 24-bit output, dynamic range supports 90dB, signal-to-noise ratio supports 85dB. Fully support FAT16/FAT32 file system, maximum support 32G TF card. Comes with 5W class D power amplifier, which can directly drive 4 ohm, 3~5W speakers. The UART serial port controls broadcast function, which can control playback, pause, song selection, volume addition and subtraction, etc. The maximum selection of songs is 65535 songs, and the baud rate is 9600bit/s. Support IO trigger playback function, 8 IO ports individually trigger 8 tracks or 8 IO ports trigger 255 tracks in combination. Support One_line single-bus serial port control, which can control functions such as play, pause, song selection, volume addition and subtraction. Support 3 configuration IOs for up to 7 working modes selection, and the DIP switch setting is simple. Product Name:DY-SV5W Voice Playback Module Product Number:DY-SV5W Work Voltage: DC 5V Working Temperature range:-20~85 Celsuis Working Humidity range: 0%-95%RH Colour: blue Material: PCB+metal Size: 40x40x9mm Package Contents: 5 x DY-SV5W 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.