Product Details  unique & attractive surface treatment switch 1600/800dpi just by one click forward backward navigation buttons  MK3 Laser Series With laser sensor STMicroelectionVT5363 At least 3 million times of button's life. Switching 800/1600dpi, just one button click. Forward and backward navigation buttons The Ergonomics-design, feel free uncomfortable from long-term use. Special surface treatment with art An unique & attractive surface, the best promotion item in occasion. USB plug, easy to use, no more drivers. PU or Elastic Paint surface procedure is optioned. Laser eye safety ( Class 1 Laser Products ) Wire length: 150±2cm Retractable USB cord is optioned for Q mouse series. Support Windows 98/Me/2000/XP/Vista & Mac .OS Mouse Dimension L x W x H 132mm X 67mm X 37mm