HAVIT: Amazon's Top 5 keyboard Brand  All HAVIT products are built to the highest quality standards and we stand behind our products with 30 day money back guarantee and a full 1 year manufacturer's warranty.  Note  This "Backlit keyboard" is associated with membrane keyboard where all keys are same membrane and backlit is like a central light shared by all, Keyboard Specification:  Interface: USB  Keyboard Size:46.5*20.0*2.1cm  Key Lifetime:5 million  Cable Length: 150cm  Current: 15mA  Voltage:5V  Mouse Specification:  Interface:USB  Buttons:6  Cable Length: 160cm  Resolution:800-1200-1600-2400DPI  Product Features:  Keyboard • A smooth-and-comfortable soft matte finish allow you to enjoy a soothing view and feel at the same time.  • Gaming keyboard with 19 anti-ghosting key: Simultaneous operation of up to 19 keys without conflict; 12 multimedia keys, interchangeable "WASD" keys and WIN keys can be disabled for gaming.  • Add two anti-skid mats on the button of the keyboard, prevent from sliding when you play game.  • Splash-Resistant Design w/Drainage Holes in the back.  • Supported operating systems range from Windows 2000 / 2003 / XP / Vista / Win7 / Win8 /Win10/Mac OS (Please note: Note:the multimediakeys just work for files on Windows)  Mouse  • Light weight  • Micro switches provide crisp, firm clicks  • Plug and play,no additional software of firmware is required  • 4 color breathing light of mouse: Red, Blue, Purple, Pink; Light-off mode: forward/back button +DPI