SANOXY Vertical mouse 2.4GHz wireless connection (USB receiver). Item type: Ergonomic Optical Mouse Material: Plastic Color: Black Button: 4 buttons and 1 wheel (middle button)and dpi(adjustable) System Requirements:Windows 10/98/Me/2000/XP/Vista/Win 7/Win8 or latest Remove the mini receiver installed at the bottom of the mouse and insert the receiver into the free USB interface of the computer.