Welcome to our shops! Dear friends, If you are interested very much, you want to order large quantities, please contact me by e-mail or talk about the price! 1:Description before buying, please carefully read the title, please make sure the board models and machine models, if not sure, right to buy the product does not match the work, this is the responsibility as a buyer, we are not responsible for, we can accept the return of goods, but we will not bear the transportation cost, if you have not understand problem, you can always send email to us, we will reply to your mail, thank you! 2.These products are used, the circuit board components no any broken,we will test it before we sent , 3. All product have been tested before shipping. If the product is faulty during shipping, please inform us immediately after your received it. 4: Don't open a dispute because the product is old. We have a detailed description. If you can't accept it, please don't make the order, and avoid causing unnecessary disputes. Thank you! 5:Part of the product is new and original, in the case of inventories have new stock, we will send all the new products, if in the case of new stock sold out, we will send the old products, but all products are strictly tested before sending, so don't worry!hope you can understand! 6:All products have a three-month guarantee period if have any quality problems, you can contact to us ,we can change goods and maintenance, If you are not satisfied,  We will try our best to satisfy you without any loss. Don’t worry