Sony VAIO VGC-LS20 Series User Manual page 30

To connect the wireless mouse
!
To connect the wireless mouse, it must be located within a range of approximately 11.8 inches (30 cm) to approximately 39.4 inches (1 m) from the
computer.
1 Insert the supplied two AA batteries into the wireless mouse as shown below.
2 Turn on the computer.
3 Press the CONNECT button (1) on the back of the computer.
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Using Your VAIO Computer