Features: brand new and high quality Adopt professional audio VU driver IC, which contains a root dynamic compression circuit, which effectively avoids the phenomenon of small signal pointer, large signal and pointer rendering. Driver board design, beautiful and reasonable layout, without any interference and self-excitation IC with mute function, the mute function foot will be lowered when it is turned on to avoid pointer overload Use AC12V power supply circuit, It is more convenient to use double-sided circuit boards to ensure that the wire terminals are firm and the straps are firmPad, not easy to loosen Specifications: Specification Color: Green Size: 55 x 66mm Rated Voltage: AC 12V Positioning Hole Distance: 55x 66mm/2.16x2.60in Diameter of Positioning Hole: 3mm Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Must link the polarity of terminal and driver rightly. Package includes: 1x VU Instrument Driver Board 1x Wiring Instructions