Feature: 1. High quality wireless mouse, which need to be used with the USB adapter. 2. Free to move within 10 meters. The folding action can open/close the mouse. 3. Built-in energy saving system. 2.4GHz wireless, operating range up to 30ft. 4. Elegant ergonomic design, comfortable hand-feeling, designed for laptop users. 5. The arc mouse design combines the comfort of a desktop mouse with the portability of a notebook mouse. When you are on the go, the arc mouse can be folded to 60% of its fully expanded size. Specification: @font-face{ font-family:"Times New Roman"; } @font-face{ font-family:"宋体"; } @font-face{ font-family:"Calibri"; } @font-face{ font-family:"Arial"; } p.MsoNormal{ mso-style-name:正文; mso-style-parent:""; margin:0pt; margin-bottom:.0001pt; mso-pagination:none; text-align:justify; text-justify:inter-ideograph; font-family:Calibri; mso-fareast-font-family:宋体; mso-bidi-font-family:'Times New Roman'; font-size:10.5000pt; mso-font-kerning:1.0000pt; } span.msoIns{ mso-style-type:export-only; mso-style-name:""; text-decoration:underline; text-underline:single; color:blue; } span.msoDel{ mso-style-type:export-only; mso-style-name:""; text-decoration:line-through; color:red; } @page{mso-page-border-surround-header:no; mso-page-border-surround-footer:no;}@page Section0{ } div.Section0{page:Section0;}Item Type: MouseColour: BlackPower Supply: 2xAAA battery (NOT included)Operating Frequency: 2.4GHzWorking Range: 30ftNumber of Button/Wheel: 3 buttons, 1 wheelCompatibility: For Windows XP/Vista/Windows 7/Mac OS X v10.2-10.5 Package List: 1 x Mouse1 x Receiver Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.