[Usage] Operational amplifier OPA627: adopts field effect tube input mode, suitable for front and rear amplifiers, output buffers, voltage amplifiers, headphone amplifiers, etc. The sound is warm and charming, the sound field. The sound quality is delicate, soft and graceful, with high clarity and bold taste. You can replace or upgrade the common dual op amps in audio, LM833, LM4562, 4558, 5532, 4556, LF353, OP275, AD712, AD827, AD746, AD797, OPA2604, OPA627 to dual, OPA637 to dual, AD797 to dual, AD843 to dual , AD847 to double, etc. [Appearance] Gold-plated adapter board pins. OPA627AU SMD single op amp, exquisite adapter board, fully gold-plated pins. [Instructions for use] When changing the op amp, be sure to see it clearly, and align the missing mark of the small half of the upper part of the op amp with the missing mark of the Ic socket and insert it accurately. It cannot be inserted backwards, otherwise it will burn! Type: Dual Op Amp Module Model Number: OPA627 color:Blue+black Material:Plastic + Metal Package Contents: 1 x Dual Op Amp Module Only 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. Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.