Before the products leave the factory, we will go through quality control, so that what we deliver to customers is a good product System compatible with , Windows 8, Windows 7, Windows XP, Vista, Linux etc. ( Note: No programming function for system.You'll need configure in windows then can be used other system. It building speaker can be listen music, also build in mic, support voice chat and voice input. It support display indoor thermometer and humidity by software. The USB build in 16GB Flash Disk storage. There are 3 RGB color (Blue, Red, Green) in the Logo breathing lighting. All mouse 9 buttons can be programmed by software built in USB flash disk which install in windows computer. It makes the mouse more intelligent and meets more demands of different game. It also can customize any combination of keys, hotkeys or shortcut keys and multimedia etc(e.g. "Ctrl + Alt + P" or "Alt + A") 9 button programmable gaming mice, default 3 DPI levels 800/1000/1600,you can adjust the DPI via press the middle of button easily. Product parameter Product Name: Optical Wired Mouse Model: MOS9T Type: Wired mouse Mouse size: rat ( equal 120mm) Connection with computer: wired Photoelectric resolution: 1600dpi (dpi) Number of keys: 9 (keys) Interface: USB Whether to support ergonomics: support Adjustable resolution: three gears and Working : photoelectric Features: gaming mouse, ergonomics, custom buttons Line length: 2 (meters) Product size: 125x72x41mm Product weight: 0.14 (KG) colour:gray Material:ABS Package Contents: 1 x wired mouse Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.