The "BG" printed on the module is green, and the printed pins are + pole, corresponding to the "+" on the board. Size: narrow screen 150 34mm, wide screen 160 40mm. 1PC LED Audio Spectrum DIY Kit. - The thicknesfor of the flattened PCB board is 14mm, the thicknessfor of the LED module is 8mm, and the total thicknessfor is 22mm.
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