1.CP461-50 S1 We sell is 100% New Original Factory packing in good condition and have been tested before they are shipped. We will try our best to avoid any quality problems. 2.We will offer the technical support by experienced staff, which have undergone rigorous testing and certification! 3.We offer 12 month warranty after receiving parcels. If there are some workmanship or material defects with the products, please contact us firstly, we will exchange it or offer other solutions for you to make a choice. 4.If you order more than one item, please contact us, we can offer further discounts for you. And if you find other suppliers offer cheaper prices for the same product, we are also willing to provide you with reference to their price,even further discounts.