This board is 8 pins. Guangzhou BoChuang electronic technology Co., Ltd. is one of Professional sound equipment factory in China. We have our own factory which located in ENPING, We concentrate on professional speaker, professional amplifiers and sound management system. Pay attention to the quality.100% provide the best quality for you! Our purpose: Quality, security, competitive prices and convenient. The best one for you is our final goal. Packaging details: 1. First layer packaging: Produce own package box.(different designs have different packaging) 2. Second layer packaging: a outer kraft box. First of all,we will check the quality very well to you before we make the shipment! Returns: If the project reaches the destination , buyers can choose to return within 14 days , via e-mail contact . We both agree that refunds , you need to mail the goods back to China address. Warranty: All products even the basic three -month sellers warranty , if the product is defective within 3 months, we will offer to replace the damaged parts , we receive the defective item for repair. If the product is defective after 3 months , buyers can still send back, we will contact the supplier or manufacturer for repair you need to pay for repair / transport costs, we will complete all security services. Feedback: Once you receiving the item with satisfaction, please leave us positive feedback, and 5 STAR DSR. Thank you! Once you Feel dissatisfied with the projects receivedplease first and us use E - mail contact and communicationDo not very direct and impulsive give a Neutral or NegativBecause the Neutral and Negative can not solve any problems! Thanks!

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