How to Change Frequencies on an R21 Receiver
- 1). Remove the single fastener screw found in the bottom (between the two prongs) of the encasement using a screwdriver.
- 2). Pull the front of the encasement (the labeled side) off the pronged portion of the receiver. Look for a black switch (located on the bottom edge of the circuit board) with "10K" and "7K" printed to the left of it.
- 3). Slide the black switch vertically to change the receiver's frequency between 7K and 10K. (These numbers refer to the frequency band of the radio signal.)