A4Tech RFSW-35 User Manual page 4

The RF-Mouse operates on
two frequency channels. To
prevent interference when
using two RF Mice in close
proximity a different frequency
channel should be used for
each mouse. Refer to the
following to change the
frequency channel for your
mouse:
1. Set the frequency channel
on the receiver to 1 or 2.
2. Remove the battery cover
from the mouse (see the
following Inserting the
Batteries section).
3. Set the frequency channel
on the mouse to 1 or 2.
(The frequency channel for
mouse and receiver must be
the same.)
— 3 —