Motorola Family Radio Service (FRS) walkie-talkies can be programmed with codes—to eliminate interference from other users. Think carefully before you program any codes into your Motorola walkie-talkie because walkie-talkies can't communicate with each other if they are programmed with different codes. That's okay if you are programming a batch—say for your family or group, but if you intend to talk with other parties on FRS frequencies, like neighborhood disaster groups for example, codes will prevent that happening.
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Press the Menu button. The label "Code' will appear on the read-out.
Press the plus, up or negative, down button to choose a interference eliminator code. It can be any code, but it needs to be the same on all the radios you want to talk to.
Press the Push-to-talk (PTT) button to enter the code.
Program a call tone. This shouldn't be the same on all the radios. The call tone broadcasts a unique sound which identifies you to other radio users on the same frequency. Press the Menu button three times and the label "CA" will flash on the read-out. Press the minus, down or plus, and up buttons to chose a tone.