Note: Please read these carefully before you buy it, if you mind it, please don't place your orders.Thank you! It is OEM, not Original genuine! OEM version is the so-called modified version, upgraded version! 70% of our parts from genuine Razer components, a small part of the production through the independent, so the appearance and feel and no difference between genuine, high similarity! To meet your mouse this section of the requirements!” Features :Ergonomic right-handed design with textured rubber side grips3500dpi optical sensorChroma lighting with 16.8 million customizable color optionsFive independently programmable Hyperesponse buttons1000Hz UltrapollingOn-the-fly sensitivity adjustmentAlways-on mode200 inches per second / 50g of accelerationGold-plated USB connectorSeven-foot, lightweight, braided fiber cableApproximate size:Length: 127mm / 5"Width: 70mm / 2.76"Height: 44mm / 1.73"Approximate weight: 105g / 0.23lbsSystem RequirementsPC / Mac with USB portWindows? 8/ Windows? 7 / Windows Vista? / Windows? XP (32-bit)/ Mac OS X (v10.7-10.9) Warranty and Guarantee： 12 months Warranty. Buy with confidence! If you are not satisfied when you receive your item, please return it within 14 days for a replacement or money back. Please contact me before you return it. If item defective in 3 month, We will send you a replacement without extra charger, or offer refund after we receive the defective item. If item defective after 3 month, you can still send it back to us. We will send you a new one after receiving the defective item. But you have to pay the extra shipping fee. Customs taxes： Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility. Please check with your country’s customs office to determine what these additional costs will be prior to bidding or buying. PaymentWe only accept PayPal for all payments!Please make payment for your purchase within 3 days. Shipping We ship to Worldwide.Free shipping fee to Worldwide.Usually delivery time 16-30 days.If you have not received item within 35 days,please feel free to contact us! Thanks!Usually we free shipping to USA & RU use ePacket,delivery time 8-15 days. ReturnWe offer full refund 100% from the price you buy.You can return item within 30 days after items received. Feedback PolicyWe will reciprocate Positive Feedback for Successful transaction.If you are happy with our service, please be so kind to leave us Positive Feedback with 5 Star ratings. Contact usIf you have any questions ,please feel free to contact us by ebay message,we will try our best to give you the best solution by communication.