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LPI (Low Power Indoor)

LPI (Low Power Indoor) is a class of Wi-Fi equipment operating in the 6 GHz band and restricted to indoor use. LPI equipment operates without Automated Frequency Coordination (AFC), subject to the technical conditions of the target market.

Regional Availability

United States: Indoor Access Points, Subordinate Devices and Client Devices are regulated under 47 CFR §15.407.
European Union: Decision (EU) 2021/1067 permits both LPI and VLP equipment in 5945–6425 MHz. LPI is not the EU’s only authorized 6 GHz device class.
Canada: ISED RSS-248 defines the applicable 6 GHz RLAN requirements.

Other markets use their own device classes and terminology. This overview uses the formal LPI classification for the United States, the European Union and Canada. Other markets use their own device classes and terminology and require a separate assessment.

United States Power Limits

Indoor Access Points and Subordinate Devices: Maximum PSD 5 dBm/MHz and maximum EIRP 30 dBm. At 20/40/80/160 MHz, the PSD limit corresponds to 18/21/24/27 dBm EIRP.
Client Devices under an Indoor Access Point: Maximum PSD −1 dBm/MHz and maximum EIRP 24 dBm. At 20/40/80/160 MHz, the PSD limit corresponds to approximately 12/15/18/21 dBm EIRP.

The higher 18/21/24/27 dBm values therefore do not apply to every LPI device type.

Antenna, Labeling and Compliance

In the United States, 47 CFR §15.407(a)(10) requires a permanently attached integrated antenna for the specified Access Point classes, including Indoor Access Points and Subordinate Devices.
U.S. Indoor Access Points and Subordinate Devices require the indoor-use warning specified in §15.407(d)(4). Decision (EU) 2021/1067 restricts LPI operation to indoor use but does not itself specify the same visible labeling requirement.
Operating a device outside its authorized conditions, such as outdoor operation of an indoor-only device, is non-compliant operation; it does not automatically erase the equipment authorization record.
Conformity assessment and authorization are market-specific, including FCC equipment authorization, EU RED conformity assessment and ISED certification.