Elecom M-IT11DR Series User Manual page 7

You will need to install the "ELECOM Mouse Assistant Mac version" from our
website to use the "Back" and "Forward" button on Mac. Refer to
Mouse Assistant".
⑥ LED light
The light around the wheel lights up red for a few seconds when the power is turned on.
The light around the wheel will blink red when the battery level is low.
⑦ Power switch
Turn the trackball power ON and OFF.
⑧ Ball (36mm)
Rotate using your fingertips to move the cursor.
Separately sold ball
Replacement 36 mm ball (M-B10SV)
⑨ Support parts (bearings)
Support the ball.
Support parts are consumables. Compatible support parts can be purchased separately
to replace existing support parts.
Optional Parts
Replacement bearing support parts (M-BS10)
Replacement artificial ruby support parts (M-RS10)
⑩ Optical sensor (under the ball)
This sensor will detect the trackballʼs movements when you move the trackball.
⑪ Ball removal hole
Push the ball out from here to clean the support parts in the housing.
* See "How to clean the trackball"
⑫ Receiver unit storage compartment
The receiver unit can be stored here when the trackball is not in use.
for details.
"Install ELECOM