ITEM NAME:NE5532 OP-AMP HIFI Amplifier Volume Tone EQ Control Board DIY Kits K5N4 NE5532 OP-AMP HIFI Amplifier Volume Tone EQ Control Board DIY Kits K5N4 10 times preamp, volume & 3 band treble/mid/bass EQ control Selected high quality components: NE5532 OP-AMP chip, mini potentiometer, Nippon Chemi-con(NCC) BP Series capacitors, 1% tolerance metal film resistors, Philipps CBB capacitors. OP-AMP chip socket included, easy to upgrade Excellent layout design, low noise Power supply: Dual 15V AC Dimension of the Board: 105mm(Length) x 54mm(Width) x1.6mm(Thickness)/4.13 x 2.13 x 0.06 inch It can connect microphone. material:plastic colour:blue package include:1* NE5532 volume control board DIY Kits Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..It can connect microphone.