PRODUCT GRADING (Grade A) -Excellent Condition > Minor if any signs of use and wear > Refurbished to the highest standards. Retail Box  WHAT IS IN THE BOX GameSir VX AimSwitch Gaming Keyboard and Mouse Combo PRODUCT DESCRIPTION GameSir VX AimSwitch can enjoy gaming with their friends on consoles while they use the input method that suits them best. Now you can enjoy multiple hot games like Call of Duty: Black Ops 4; Red Dead Redemption 2; Battlefield 5; Fallout 76; Just Cause 4; Assassin\'s Creed: Odyssey; Anthem; Splatoon 2, etc... GameSir GM190 Gaming Mouse DPI & POLLING RATE Adjustment When pressing the DPI button to adjust 4 levels of DPI (500/1000/1500/2000), the indicator light of the GameSir GM190 gaming mouse will flash in a different colour.Please update the firmware to the latest version from our website before use: gamesir.hk/pages/gamesir-vx-upgrade-tutorialFAQ：Q: How much should I adjust the dead zone?A: If you find it difficult to use the mouse and feel the delay, reduce the dead zone value with the G-Crux app. You can also adjust the smoothness of the mouse. Take a look at this Dead Zone and Smoothness Adjustment Tutorial. Link: www.youtube.com/watch?v=619gqOAazxEAt the same time, try adjusting the controller\'s X / Y axis sensitivity appropriately in the game settings. Besides, try replacing the mouse with a higher DPI.