The Global First Solar Mouse-Almighty EXTREMELY GOOD Wireless Solar Mouse T003 (White) The Latest Solar Energy-saving Mouse, System Support:XP,Window7,VISTA,DOS, Mac OS* x 10.4 or later USB port Solar-powered Mouse: No battery hassles - any light source keeps your mouse charged,full power can be used at least one month in total darkness 4 tracking Speed without Drive: Ulra-thin design,4 speed models(1200-1600-2000-800DPI ) without Drive in the game and accurately position. Powerful 2.4 GHz wireless: Enjoy a reliable connection using a tiny Unifying receiver that stays in your computer,up to 10m working distance without any holdback. Intelligent Power Saving: AI power saving Design,4 level saving mode, sleep when process idle,power off when receiver no connection