Check the listing for details. FN-BC10S-N MP3 Player Sound Board with 25W*2 Stereo Amplifier (NEGATIVE TRIGGER). Condition: New. Listed at 36.95 USD. Description: FN-BC10S is a high quality MP3 player soundboard developed by Flyron Technology Co., Ltd. Equipped with a25W*2 class D amplifier, the sound module can be controlled by 10 separate buttons (switches) hooked up to the“one-on-one" inputs terminals and by RS485 or UART serial port. This board can use both NEGATIVE and POSITIVE button triggers to activate, just use the corresponding terminal. When it is playing a sound, it is able to drive an external load (equipment) like a warning light or a motor simultaneously. Great audio output, industry-grade designand strong anti-jamming capability make it possible to be used for many different applications. FeaturesEquipped with a high quality audio decoder, which supports MP3 and WAV audio formats.Uses 3.81mm pitch terminal blocks, and it’s very easy to connect wires using a small slotted screwdriver. Supports button control mode, UART serial control mode, and RS485 serial control mode. Negative trigger and positive trigger are available to choose for button control mode. In button control mode, it supports 10 types of trigger modes. -Set a trigger mode using a config file (text file) easily. Uses the built-in SPI flash memory and a micro SD card as the storage devices. Built-in 8MB SPI flash memory and supports max. 32GB micro SD card. Equipped with a type-C USB connector. Possible to load audio files to the flash memory/micro SD card directly via USB connection to computer. -The flash memory/micro SD card will be detected as a USB flash drive on computer. -The solder pads at the back of the USB connector are used to connect to an external USB connector, which can be a connector for USB flash drive (USB stick) or a connector for connecting to computer. Equipped with a class D stereo 25W*2 amplifier that can drive two max. 25 watts speakers directly. Equipped with a 3.5mm audio jack for stereo output that can drive an earphone directly or connect to an external amplifier. -The holes on top of the audio jack are used to connect an external audio jack or directly connecting to external amplifier. Adjustable sound volume for speaker output through the volume knob. -The holes below the volume knob are used to connect an external volume potentiometer. Able to power up an external equipment like a warning light simultaneously when it is playing a sound. There is a terminal for busy output. When the board is playing, it outputs 3.3V; while it is standby, it outputs 0V. There are four mounting holes in the board. Easy to fix. Technical ParametersWorking voltage: DC 12V-24VWorking current: ≥4500mA @12V (when it has two 25W speakers, and external load/warning light is not connected)≥2250mA @24V (when it has two 25W speakers, and external load/warning light is not connected)Output current to an external load/warning light: ≤1000mAPower consumption: ≤50W ( (external load/warning light not included))On-board flash memory size: 8MBAudio format: MP3 and WAV