Shipping Free shipping within US. Delivery to most US addresses in 2-3 business days. International: http://pages.ebay.com/seller-center/shipping/global-shipping.html ProductsBrand new and sealed in retail package High performance hero 16k sensor: Logitech most accurate sensor yet with upto 16,000 dpi for the ultimate in gaming speed, accuracy and responsiveness across entire dpi range11 customizable buttons and onboard memory: Assign custom commands to the buttons and save Upto five ready to play profiles directly to the mouseAdjustable weight system: Arrange upto five removable 3.6 gram weights inside the mouse for personalized weight and balance tuning. Requirements - Windows 7 or later. macOS 10.11 or later. Chrome OS. USB portProgrammable RGB lighting and lightsync technology: Customize lighting from nearly 16.8 million colors to match your team's colors, sport your own or sync colors with other Logitech G GearMechanical switch button tensioning: Metal spring tensioning system and pivot hinges are built into left and right gaming mouse buttons for a crisp, clean click feel with rapid click feedback Return 1) 30 days worry free return. 2) Serial number is recorded when it's shipped. 3) 15% restocking fee may be applied if the product or original package was damaged by the buyer. Higher restocking fee may apply if any parts are missing. 4) Buyer pays return shipping if item is not defective. Seller will pay for return shipping if item is tested defective and will waive the restocking fee. 5) Should you have any question, please ask seller first. We will try our best to make it as easy as possible.