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 v10.2-10.5Package List:1 x Mouse1 x ReceiverNote: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.