GE 97990 GE Wireless Optical Mouse for PCs - Manual (Page 5)

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Note:
Optical mice do not work well on glass or highly reflective surfaces. If
your mouse does not work properly, try a different surface such as a
plain white piece of paper.
POWER SAVING FEATURES
1. After a period of inactivity, the Wireless Optical Mouse goes
into sleep mode to save batteries. To wake the mouse, press
any mouse button.
2. The low battery LED located on the bottom of the mouse will
illuminate when the batteries are low and need to be changed.
3. There is an on/off switch located on the bottom of the mouse. If
the mouse will be unused for an extended period of time or
while traveling the mouse can be turned off to conserve the
batteries. This will prevent the batteries from being used every
time a mouse button is hit. The mouse must be turned back on
before use.