The type of radio needed will vary based on the use. A small, lightweight radio maybesufficient for short range applications, such as directing traffic, but for communications within a school building a more powerful radio isrecommended. Most schools use thick concrete for walls, which is difficult for the signals of weaker radios to penetrate. Single channel radios are adequate for many situations, but multi-channel models may be helpful if you have several groups that need to have separate communications.
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