Features
●Supports MP3 format,stereo audio output
●Supports for 32Mb to 1GB of SD card.
●Update MP3 files to SD card directly and easily
●DAC 24bit/s stereo,196KHz audio decoder.
●Powerful anti-jamming with stable performance
●Play 30 different mp3 files by corresponding connected buttons/ switches
Technical Parameters
*Operating voltage: AC8 ~ 18V，or DC8~18V
*Rated output: 10W × 2 (RL = 8Ω d = 1%)
*Frequency response: 20 ~ 20 KHz
* Voltage noise: ≤ 50MV
*S/N(signal to noise ratio): ≥ 86db
*Plate Size: 150 × 80mm
Instructions:
•Power Input Ports: Supply AC or DC 8-18V. You can connect with any of both ports for 8-18V or GND(no difference here).
•L&R Audio Output Ports: Connect the L port and the R port with the GND port for 10W*2(L&R) audio output.
•VSS: No need to use this terminal port here. Just ignore it.
•Button Connection Ports: Connect 30 buttons for playing 30 different MP3 files in the SD card through the Matrix connection mode(See "4.Button Connection Mode" below)
•Power LED: It will be on after get the board powered on.
•Volume Control for L: Adjust the sound volume for the left channel.
•Volume Control for R: Adjust the sound volume for the right channel.
•SD Card Sot:Insert the SD card to the SD card slot with the correct direction.
•Card Reading Indicator: It will be on when the device reads the SD card normally.
•Busy Indicator: Used for playing status indication. It is on when playing.