FCC Part 15 is a section of the Federal Communications Commission (FCC) regulations that deals with the operation of unlicensed radio frequency (RF) devices. This part of the Code of Federal Regulations (CFR) ensures that such devices do not cause harmful interference to authorized radio communications and are not susceptible to interference from other devices.

Key Subparts of FCC Part 15

1. Subpart A - General: Covers the general provisions and definitions related to Part 15 devices, including the scope of the rules and the types of equipment covered.
2. Subpart B - Unintentional Radiators: Applies to devices that unintentionally emit RF energy, such as digital electronics, computers, and other electronic devices.
3. Subpart C - Intentional Radiators: Applies to devices that intentionally emit RF energy, such as wireless transmitters, Bluetooth devices, and Wi-Fi equipment.
4. Subpart D - Unlicensed Personal Communications Service Devices: Covers devices operating in the unlicensed personal communications services (UPCS) band.
5. Subpart E - Unlicensed National Information Infrastructure (U-NII) Devices: Covers devices that operate in the U-NII bands, such as Wi-Fi routers and access points.
6. Subpart F - Ultra-Wideband Operation: Covers ultra-wideband (UWB) devices that emit RF energy over a very wide frequency range.
7. Subpart G - Access Broadband over Power Line (Access BPL): Covers the use of power lines for broadband communications.
8. Subpart H - White Space Devices: Covers devices that operate in the TV white spaces.