["brand new and high quality\nFeatures:\nMade of high quality material, solid, durable, good performance and long service life.\nThe board features a very high signal-to-noise ratio and strong anti-interference ability. When there is no signal input, no noise is heard near the speaker.\nThe adjustment potentiometer is fully sealed. The input and output terminals are made of pure copper terminals, and the wiring is very convenient.\nThe op amp adopts Texas NE5532, and the IC for seat can be soldered at any for time to change the op amp, and the effect brought by different op amps can be improved.\nIt is designed with LED indicators to monitor the power status in real for time.\nFilter Board only, other accessories demo in the picture is not included!\n\nSpecification:\nMaterial: PCB Board, Electronic Components\nPower supply voltage: DC10-24V, single power supply\nFrequency range: 22Hz-300Hz\nAudio input: Mono or Two-channel\nAudio output: Mono\nSize: app.7.8 x 3.2 x 0.16cm/3.07 x 1.26 x 0.06in\nFixed Hole Center Distance: app.7 x 2.4cm/2.76 x 0.94; Hole Dia.: 0.32cm/0.13in\nPotentiometer Center Distance: app.3.25cm/1.28in\nColor: Light Green\nQuantity: 1 Pc\n\nNote:\nNo retail package.\nPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage includes: \n1 x Filter Board"]