Product Parameter Wireless frequency: 2.4GHz Interface: USB Plug and play: Support Multimedia Function keys: Yes Ergonomics: Support System support: for WinXP / win7 / win10 for Macintosh /for Mac OS x 10.3+ -Keyboard: Keys: 104 key Built-in battery capacity: 3000mAh Light Effects: White Backlit Size: 440*135mm/17.32*5.31'' -Mouse: Adjustable 4 DPI: 800-1200-1600-2400 Built-in Battery Capacity: 800mAh Light Effects: With 4 color automatic circulation breathing,(not adjustable) Button: 6 Buttons Size: 130 * 76 * 40mm/5.11*2.99*1.57'' -Package Included 1*Backlit Keyboard 1*Gaming Mouse(USB receiver within it) 1*Charging Cable 1*User Manual 1*Mouse Pad Note: 1.The keyboard and mouse set share one USB receiver, which place in the bottom of the mouse, insert the receiver into the computer USB port, they will auto connect 2.Please make sure the keyboard and mouse is full charged before their first use Our service Our products are 100% brand new and high quality.All of them are checked before we send,so you can purchase it at ease Make our customers sastisfy is our goal,if have any questions,please feel free to contact with us,we will response you as soon as poosible and provide you right solutions