FCC 认证
FCC ID 是什么格式？如何查询验证？
FCC ID 由两部分组成：3–5 位的受证人代码（FCC 分配给公司）+ 产品代码（字母数字，由受证人自定，每型号唯一）。例：`2ABCD-ROBOT1`。标签必须永久、可读，贴附于设备本体——若设备带屏并符合 FCC 电子标签规则，可改为电子显示。查询方式：访问 fcc.gov/oet/ea/fccid，输入 FCC ID 即可获得测试报告、内部照片、用户手册和授权信息。常见错误：把型号当作 FCC ID（错——必须包含受证人代码）、标签位置不当、硬件改版后未提交 Class II 许可变更。仅软件改动不需要新的 FCC ID；影响射频行为的硬件改动则必须重新申请。
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How does an FCC ID work, and how do I verify one?
An FCC ID is two parts: a 3–5 character grantee code (assigned by the FCC to the company) plus a product code (alphanumeric, chosen by the grantee, must be unique per model). Example: `2ABCD-ROBOT1`. The label must be permanent, readable, and on the device — or displayed electronically if the device has a screen and meets the FCC's e-label rules. To look one up: visit fcc.gov/oet/ea/fccid, enter the ID, and you'll get the test report, internal photos, user manual, and grant details. Common mistakes: using your model number as the FCC ID (wrong — it has to use the grantee code), wrong label placement, and not filing a Class II permissive change after a hardware revision. Software-only changes don't require a new FCC ID; hardware changes that affect RF behavior do.
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