Sony VGC-LT30 Series - Manual (Page 29)

29 n N
Getting Started
4 Slide the power switch on the bottom of the mouse to the ON position.
5 Press the CONNECT button (1) on the back of the computer.
6 Press the CONNECT button on the bottom of the mouse within 10 seconds from step 5.
Communication between the mouse and the computer should now be established.