Wireless baby monitor
A 2.4 GHz video monitor placed a metre from a cot is a continuously transmitting source at close range — roughly 8,000 µW/m² at 1 m for a 100 mW unit.
radiofrequencyhome
Last verified 12 August 2026.
Also searched as: nursery camera, video monitor
- Category
- radiofrequency
- Emission bands
- 2.4 GHz ISM; DECT / FHSS audio
- Environments
- home
- Transmit power
- 0.1 W EIRPRegulatory value — legally enforceable — Typical Part 15 consumer transmitter power. Transmit power is the regulatory or typical maximum; real devices often transmit below it and reduce power when link quality allows.sources: fcc-part15
- Duty cycle
- Video monitors stream continuously; audio-only and voice-activated units transmit intermittently.
Field strength by distance
- 30 cm
- 88,400 µW/m²Computed estimate — S = EIRP / (4πd²) with EIRP = 0.1 W, d = 0.3 msources: fcc-part15
- 1 m
- 7,960 µW/m²Computed estimate — S = EIRP / (4πd²) with EIRP = 0.1 W, d = 1 msources: fcc-part15
- 3 m
- 884 µW/m²Computed estimate — S = EIRP / (4πd²) with EIRP = 0.1 W, d = 3 msources: fcc-part15
Mitigations, most effective first
- Place the unit at least 2–3 m from the cot rather than on the cot rail.
- Increasing 0.3 m to 3 m is a 100× reduction in power density.
- Choose an audio-only, voice-activated, or wired monitor.
- Removes continuous transmission during sleep.
Measure with
- Broadband RF power-density meter
Related records
- Building Biology SBM-2024 RF band: extreme anomaly
Above 1000 µW/m² peak from a single RF source in a sleeping area is graded 'extreme anomaly' and triggers a remediation recommendation.
Exposure limits
- Wi-Fi router (2.4 / 5 / 6 GHz)
A consumer access point radiating roughly 100 mW EIRP per band, giving about 8,000 µW/m² at 1 m and 80 µW/m² at 10 m in free space.
Sources & emitters
Sources
- fcc-part15 47 CFR Part 15 — Radio Frequency Devices (unlicensed transmitter power limits) — U.S. Government Publishing Office (eCFR). regulation, link checked 2026-08-12.
- itu-fs-relations Free-space path loss and power density relations (ITU-R P.525) — International Telecommunication Union. standard, link checked 2026-08-12.
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