Espressif Systems ESP32-S2-SOLO-2 User Manual page 14

4 U.S. FCC Statement
Antennas
Antenna specification are as follows:
• Type: On-board PCB antenna
• Gain: 3.26 dBi
This device is intended only for host manufacturers under the following conditions:
• The transmitter module may not be co-located with any other transmitter or antenna.
• The module shall be only used with the external antenna(s) that has been originally tested and certified with
this module.
• The antenna must be either permanently attached or employ a 'unique' antenna coupler.
As long as the conditions above are met, further transmitter test will not be required. However, the host
manufacturer is still responsible for testing their end-product for any additional compliance requirements required
with this module installed (for example, digital device emissions, PC peripheral requirements, etc.).
Label and Compliance Information
Host product manufacturers need to provide a physical or e-label stating "Contains FCC ID:
2AC7Z-ESPS2SOLO2" with their finished product.
Information on test modes and additional testing requirements
• Operation Frequency:
– WiFi: 2412
~ 2462 MHz
• Number of Channel:
– WiFi: 11
• Modulation:
– WiFi: DSSS; OFDM
Host manufacturer must perform test of radiated and conducted emission and spurious emission, etc., according
to the actual test modes for a stand-alone modular transmitter in a host, as well as for multiple simultaneously
transmitting modules or other transmitters in a host product. Only when all the test results of test modes comply
with FCC requirements, then the end product can be sold legally.
Additional testing, Part 15 Subpart B compliant
The modular transmitter is only FCC authorized for FCC Part 15 Subpart C 15.247 and that the host product
manufacturer is responsible for compliance to any other FCC rules that apply to the host not covered by the
modular transmitter grant of certification. If the grantee markets their product as being Part 15 Subpart B
compliant (when it also contains unintentional-radiator digital circuity), then the grantee shall provide a notice
stating that the final host product still requires Part 15 Subpart B compliance testing with the modular transmitter
installed.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to
Part15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
Espressif Systems 14
ESP32-S2-SOLO-2 User Manual v0.5