This is a curved mouse which allows your hand to fit comfortably when using. It has a wheel, a right and left click button, a forward and back button and a nano receiver that you store in the mouse when not using it. 2 AA battery are needed and is state to have an 18-month life. It is Plug and Play. Insert the nano receiver into USB port and power on the mouse. DPI levels are adjustable and there is a low battery indicator. The included instruction booklet is easy to read and understand.