Targus AMW50US User Manual page 5

Targus Wireless Optical Mouse
(B) Plug the USB receiver into an available USB port on your computer.
(C) This mouse is a plug and play device. It will automatically operate
when the USB receiver is connected to the computer.
Low Battery Power Indicator
The light illuminates from the seam between the left and right buttons. It
will turn on when the power is low and batteries need to be replaced.
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