E-3lue Cobra LED High-Speed Response 2.4GHz Wireless Optical Engine Gaming Mouse 100% Original Cobra II Dazzle LED Wireless Edition Mouse High performance optical sensor - The mouse is with high performance optical sensor which ensures excellent precision and control. With Three levels DPI, high mobility and accuracy can be guaranteed. Clamp on design - The clamp on design at the front of the mouse is effective to lengthen the clicking button of the mouse. Its unique structure differentiates itself with traditional mice. To combine with the sophisticated micro switch, high-response clicking can be achieved. Internally solidified to enhance stability - Built in light weight metal is installed in the mouse to increase stability. It helps to combine stability and perfect hand feel. Excellent control and stability can be achieved. E-3lue AVAGO latest energy saving technology and power switch,off switch for the dazzle light.you can use your mouse without power interruption for up to 12 months.