1.Description: It is a NE5532 front board.It has two audio output channels,with four volume adjustment buttons,you can adjust the bass,midrange,and treble.2.Feature: 1).It has two audio input ports and two audio output ports. 2).It has a volume adjustment button to adjust the volume. 3).It has terminals and sockets,you can choose one of them to connect.3.Parameter: 1).Product Name:NE5532 Front Board 2).Supply Voltage:AC 12V-18V 3).Audio Quantity:Two channels 4).Adjustment Type:Treble+Midrange+Bass+Total volume 5).Audio Input:3P terminal block (audio input 1)/3P2.54mm socket (audio input 2) 6).Audio Output:3P terminal block (audio output 1)/3P2.54mm socket (audio output 2) 7).Work Temperature:-25℃~85℃ 8).Work Humidity:5%~95%RH 9).Size:100*43.5*30mm4.Package: 1).1pc NE5532 Front Board