Cost-effective， it is no doubt a great product. A wonderful gaming mouse to help you win the battle.  Features:  Intergrated and fashion design， best for business and office use.  With colorful backlit keyboard and mouse， charming when using.  Adjustable DPI with mouse for your different need.  "Scroll Lock" to turn ON/OFF the backlit.  Plug and play.  Specifications:  Type: keyboard & mouse combo  Interface: USB  Mouse button: 4  Key life: 10 million  Color: grey  DPI: 800/1200 (adjustable)  Mouse size: 7.3 * 12 * 4cm / 2.87 * 4.7 * 1.57in ( L * W * H )  Keyboard size: 44 * 15 * 3cm / 17.32 * 1.85 * 1.18in ( L * W * H )  Combo weight: 519g / 18.30oz  Package weight: 780g / 27.49oz  Package size: 47 * 17 * 8cm / 18.5 * 6.69 * 3.14in ( L * W * H )  Package list:  1 * Keyboard & Mouse Combo