Check the listing for details. [ Flyron FN-BC06-TB ] Multifunctional MP3 Player Sound Board. Condition: New. Listed at 28.95 USD. Features 6 trigger input ports available and triggered by negative pulse or GND. The function/trigger mode of each input port can be set individually through a config file. Support 7 main trigger modes and 5 assistant trigger modes. Equipped with a high quality audio decoder that is able to decode MP3 and WAV audio formats. Built-in a 4MB flash memory by default, and supports max. 32GB micro SD card. Able to update audio files through the micro USB port based on PC like using a USB flash drive. Built-in a mono 15 watts class D amplifier and possible to solder a 3.5mm audio output jack on the back of the module. Technical Parameters Working voltage: 9-24V DC Working current: ≤2000mA Standby current: ≤10mA Power Consumption: ≤15W Audio format: MP3 / WAV