Safe and Sound Pro II Review Australia 2026: The Bedroom RF Meter, Assessed

Drafted with AI assistance and checked against published specifications and certifications. First-hand measurements appear only where stated. How we make content

The Safe and Sound Pro II is the RF meter to use if your question is how low the wireless signal really is where you sleep. It reads from 200 MHz to 8 GHz, its display goes down to 0.001 µW/m² (Safe Living Technologies gives 0.005 µW/m² as the bottom of its measuring range), and its range is linear from 0.1 µW/m² upwards, which is the building biology “no concern” line for sleeping areas. It measures RF only, its accuracy is ±6 dB, and it costs $569.95 on Amazon AU, $499 from SaferEMF on the Gold Coast, or $99 to hire for three days. If you want one meter for the whole house, including wiring and appliance fields, buy a TriField TF2 instead.

I bought a TF2 to measure my own house, and it showed me its limit quickly: at my pillow it reads 0.048 mW/m², which is 48 µW/m², and below 1 µW/m² it cannot show anything at all. Clearance diving teaches you to learn where an instrument stops being useful before you trust it. For a bedroom checked against building biology guidance, the TF2 stops too early. That gap is the whole case for the Pro II.

Linear from0.1 µW/m²display to 0.001 µW/m²

Assessed | Not tested by me

Safe and Sound Pro II (Safe Living Technologies)

RF only, 200 MHz to 8 GHz | ±6 dB from 400 MHz to 7.2 GHz | PEAK, MAX and AVG in µW/m² or V/m | Rechargeable, USB-C | 2-year warranty | $569.95 Amazon AU, sold by the maker (31 Oct 2026)

Check the Pro II Price on Amazon →

Why I am reviewing a meter I don’t own

Because my own meter can’t answer the question most people buy an RF meter for. The TriField TF2’s RF display steps in 0.001 mW/m², which is 1 µW/m². The German building biology guidelines for sleeping areas (SBM-2008) put “no concern” below 0.1 µW/m² and “slight” between 0.1 and 10 µW/m². A TF2 showing 0.000 could be in either band. A Pro II shows the number.

In my case the pillow reading of 48 µW/m² is already in the SBM “severe” band (10 to 1,000 µW/m²), so the TF2 told me what I needed: there was something to fix. The Pro II earns its price after the fix, when you want to know how far down you have actually got. My TF2 readings and photos are in the TriField TF2 review.

Specifications

These are for the current rechargeable version with a USB-C port, which is the one on Amazon AU (listed from 8 June 2026). Older units run on AA batteries. Where this page quotes the manual, it is the manual for the AA version, whose frequency and linear ranges match the rechargeable product page.

What its numbers really mean

The linear range is the number that matters. Safe Living Technologies rates the Pro II as linear from 0.1 to 1,000,000 µW/m², with “reduced tolerance” down to 0.005 µW/m² and up to 3,180,000 µW/m². The bottom of the linear range sits exactly on the building biology “no concern” line. So a Pro II reading of 0.05 µW/m² tells you the room is very low, but the exact figure below 0.1 is less certain than one above it. For deciding whether a bedroom is in the lowest band, that is good enough; for quoting two decimal places, it is not.

±6 dB is a factor of four. In power density, 6 dB is close to four times. A true 100 µW/m² could read anywhere from about 25 to 400 µW/m² and still be within specification, and the ±6 dB figure applies only from 400 MHz to 7.2 GHz. That sounds loose, and for absolute numbers it is. For comparing the same spot before and after a change, with the same meter held the same way, it does not matter much, and that is how most people use it.

PEAK, MAX and AVG. The manual defines PEAK as the highest instantaneous level, MAX as the highest PEAK since you last reset it, and AVG as the time-averaged power density. Building biology guidance uses peak readings. Regulatory limits are averaged: ARPANSA’s general public reference level for 2 to 300 GHz is 10 W/m² (10,000,000 µW/m²) averaged over 30 minutes. Wi-Fi and phones transmit in short bursts, so their peak can sit far above their average. When you compare a Pro II reading with a guideline, compare peak with peak, or average with average.

The LED scale vs building biology

The coloured LEDs are the fastest way to read the Pro II, but they do not line up exactly with the building biology bands. The thresholds below are from Safe Living Technologies’ product page, referenced to 2.4 GHz; the advice is from the manual, which says its levels reflect building biology standards (SBM-2015 uses the same sleeping-area RF bands as the 2008 table shown here):

Two things follow. A flashing green LED does not by itself mean the building biology “no concern” band; for that you need the display to show under 0.1 µW/m². And a solid green, which the manual calls good for sleeping areas, is the SBM “slight” band. Read the number, not just the colour.

My TF2 readings on the Pro II scale

To make the scale concrete, here are my own TF2 RF readings converted to µW/m² and placed on the Pro II’s LED steps. This is a translation of numbers, not a Pro II measurement: the two meters have different antennas and accuracy (the TF2 is specified at ±20% at 1 GHz), so a Pro II in the same spot would not read exactly the same.

None of my readings reached the green steps, which is the point: the green range is below what the TF2 can show. My router runs on a timer, off from 9 pm to 6 am, which is covered in the router timer guide. Even the highest of these is more than 2,000 times below ARPANSA’s 10 W/m² reference level (which is a 30-minute average, and lower below 2 GHz); the comparison above is against precautionary guidance, not a safety limit. For RF, ARPANSA says there is no established scientific evidence of adverse health effects from low-level RF below its limits.

How to use it properly

1. Hold it away from you. The manual says to keep the meter at least 30 cm from your body, which otherwise blocks and reflects the signal. 2. Sweep in all directions. Move it slowly through every direction to find the highest MAX, and treat it as directional. 3. Reset MAX at each spot. A short press of MAX RESET clears it; hold it for three seconds to switch between µW/m² and V/m. 4. Wait for the bursts. Smart meters and phones check in intermittently, so give each spot a minute or two before writing down the MAX. 5. Listen. Each source has its own sound signature, and Safe Living Technologies publishes a sound library so you can learn Wi-Fi from DECT from a smart meter. 6. Change one thing and re-measure the same spot, held the same way.

The bedroom method step by step is in the EMF bedroom audit guide. For the router itself, see router safe distance.

Limitations

It measures one thing. Wiring, switchboards, power lines and appliances produce low-frequency magnetic and electric fields, which the Pro II cannot see at all. In my house the biggest magnetic field I measured was at the gas oven door (49.8 mG on the TF2); a Pro II would show nothing there. It forgets. There is no log; MAX holds only the single highest peak since you last reset it, so it is a spot-check tool. (The manual for the older AA version adds that it switches itself off after 30 minutes on battery, and runs continuously on USB power.) For an overnight record, the GQ EMF-390 logs every second, though without a published accuracy figure. Version confusion. Older units run on AA batteries. Their manual gives the same frequency and linear ranges; buy the current rechargeable listing (below) so the battery and charging details on this page apply.

Buying one in Australia

Watch for an older Amazon AU listing of the Pro II (about $562, sold by a third party) whose description is for a different model, the Classic II. If you buy on Amazon, use the listing sold by Safe Living Technologies. If you only want to check one or two rooms, hire it: $99 for three days answers the question, and the $400 deposit is refunded when it goes back.

Pro II vs the alternatives

If you can only buy one meter, the TF2 covers more of the house. If your concern is bedroom RF, the Pro II answers it and the TF2 cannot. The sensible pairing is a TF2 to own and a Pro II hired for three days. The full head-to-head is in TF2 vs Safe and Sound Pro II, and every meter is compared in the best EMF meters in Australia. The Acoustimeter AM-10 is the other meter in this class; see TF2 vs Acoustimeter.

Verdict

The Safe and Sound Pro II does one job, and it is the job the all-round meters can’t do: tell you how low the RF is where you sleep. Its linear range reaches down to the building biology “no concern” line, it shows peak and average together, and its sound makes finding the source quick. Its ±6 dB accuracy, missing log and RF-only design are real limits, and they are why I would pair it with a TF2 rather than replace one. Buy it if bedroom RF is your concern and you will use it more than once. Hire it for $99 if you want one answer. Buy a TriField TF2 instead if you want one meter for the whole house.

Frequently asked questions

Written by Jayce Love

Former Royal Australian Navy Clearance Diver and TAG-E counter-terrorism operator. Founded Clean and Native to apply the same rigorous thinking to the home environment.

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