Name:NE5532 OP-AMP BoardChannels: 2 (2.0)Working voltage: DC: 12V-30VMagnification :5 timesChannel: StereoBoard size:50*30*15 mmInstallation size:43*23mmSize: 36.4*35.5mmColor: GreenMaterial: metal, PCPackage Contents:1 * Amplifier BoardOnly the above package content, other products are not included.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.