Name:NE5532 OP-AMP BoardChannels: 2 (20)Working voltage: DC: 12V-30VMagnification :5 timesChannel: StereoBoard size:50*30*15 mmInstallation size:43*23mmSize: 364*355mmColor: GreenMaterial: metal, PCPackage Contents:1 * Amplifier BoardOnly the above package content, other products are not included.Note: Light 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. If you have any questions, concerns, or need further information, please feel free to contact us anytime. Our team is dedicated to providing you with support and answering any inquiries you may have. Your satisfaction is our ultimate goal. We look forward to offering you top-quality products and service! Thank you for your support._x000D_