... . Operate it by double hands with smooth and good function 8.With unique OFN and Cursor Positioning Built in newest technology,high sensitive OFN ... , 2 seconds without action automatically shut off. 11.Built in receptor,easy to carry With rubber sealing cap,NANO Receptor can be embeded ... PC,Industrial Computer,intelligent TV, Projectors,and so on. Mini Wireless Keyboard With Trackball Mouse