Specification Brand : IndustrialField BulletPoint1 : Amplifier Board Sound Audio amplificador for Speakers TPA3116D2 50Wx2 100W BulletPoint2 : Developed Countries Estimated Delivery Time: 7-17 days(trackable),Other countries Estimated delivery time : 8-30 days.----- We provide Expedited Shipping service : 3-8 days.(excluding handling time).If the order amount above US $200, we will use Expedited Shipping service for free. BulletPoint3 : If it is not delivered within the specified time, or if it is not satisfactory. You only need to send a refund request and we will refund you in full. BulletPoint4 : We make every effort to provide customers with satisfactory service.any question,please feel free to contact me. BulletPoint5 : any question,please feel free to contact me. ExternallyAssignedProductIdentifier : 4793392488148 ExternallyAssignedProductIdentifier1 : 0729530472032 ExternallyAssignedProductIdentifier2 : 729530472032 ItemName : LM358 100 times gain Signal amplification amplifier Operational Amplifier Module ItemPackageQuantity : 1 ItemTypeKeyword : electronic-component-audio-amplifiers Manufacturer : IndustrialField Material : wood NumberOfChannels : 1 PartNumber : IF-modulen_11633 ProductDescription : 1, onboard LM358 chip 2,100 gain of the circuit design 3, onboard 10K adjustable resistance, you can adjust the magnification 4, on-board power indicator 5, the chips are pin has been drawn, you can directly input and output signals 6, the working voltage: 5 ~ 12V 7, board size: 32.7 (mm) x13.3 (mm) Notes: This version does not support a dc signal amplification, please buy with caution! 9542 RoarKit sensor module