Bluetooth What You Will Learn Nowhere Else – Is It Really Dangerous?

A few days ago I received this message from one of my readers, Craig, who is worried about Bluetooth radiation:

Hi Lloyd,
I have a quick question, or maybe not such a quick question.
What’s the best way to reduce radiation when listening to streaming audio on a cell phone:
– A Bluetooth headset?
– Does Bluetooth drastically cut down on radiation as compared to having the cell phone near my ear?
– A physical wired headphone?
– Does the radiation transmit up the headphone cable that’s physically plugged into the phone?
– Those “thick protector stickers” that you apply to the outside of your cell phone?
Unfortunately, I depend on the internet, and consequently cell phone, for the majority of my news; and tune into my favourite radio stations while driving for work, at the gym, or doing chores around the house.
Do you have a chart or is there an article you can direct me to that contrasts/compares methods of getting the most sound to your ears with the least amount of radiation?
Thanks for a great site and newsletters!

Here is the answer I sent him :

Hi Craig

Thanks for your great question. Below is my not so quick answer :

Bluetooth Radiation – What You Need To Understand

Bluetooth is the name of a wireless technology that uses pulsed radio frequency signals. Anybody that has been following my website will have just felt their ears prick up as I said the word “pulsed”. Not good.

Here is what Dr. Andrew Goldsworthy has to say about pulsed radiation:

“Pulses carried by microwaves are particularly dangerous. This is because their very short wavelength allows the transmission of pulses with extremely rapid rise and fall times, and it is the rate of change of the fields (rather than their total energy) that does most of the biological damage” Source.

Because when we talk about pulsed radio frequency signals we are of course talking about radiation, or in this case Bluetooth radiation. Read on….

Bluetooth is now used extensively in today’s world, in cell phone headsets, computer accessories such as keyboards, printers, personal digital assistants (PDAs), personal media players, GPS, gaming equipement, and also various medical health and wellness devices.

This Bluetooth technology is used for more and more personal and commercial applications. The Bluetooth Special Interest Group now lists over 6000 products that utilize Bluetooth technology.

All the more reason that we should be really clear as to what the potential dangers are with Bluetooth radiation.

Is All Bluetooth The Same?


bluetooth radiation from a wireless headsetBluetooth transmits at frequency levels in the 2.4 GHz band. There are three power classes and it's these power classes which are your best indicator as to what level of Bluetooth radiation you're exposing yourself to :

Class 1 transmitters — are the most powerful, have a range of 100 meters and peak transmission power of 100 mW (milliwatt)

Class 2 transmitters — are usually found in mobile devices and they have a range of 10 meters and operate at 2.5 mW peak transmission power

Class 3 transmitters — these are the weakest and operate in a range of less than 10 meters and have a peak transmission power of 1 mW

So the first thing to do is to check what class of transmitter your Bluetooth headphone is. You should find this information in the manufacturers specification. I say ‘should' because it seems some manufacturers deem in unnecessary to share this information. That's why I've done some research on this and listed at the bottom of the page a selection of the ‘lower EMF' Bluetooth devices that are on the market.

What about Bluetooth radiation?

The radiation from your Bluetooth earpiece will zap you just the same because Class 1 Bluetooth headsets can expose you to the similar radiation levels to your cell phone if they're operated in close proximity to the body.

What Does Bluetooth Version Mean?

Don't confuse Bluetooth version and Bluetooth Class. When looking at Bluetooth devices you'll often see terms like “Bluetooth V2.1 compliant” or “Bluetooth version 3.0”. This tells you the Bluetooth software the device uses but Bluetooth version has nothing to do with Bluetooth class.

Bluetooth versions are all about offering enhanced data speeds. These data speeds are improving all the time as the technology evolves. Bluetooth version 1.0, the earliest Bluetooth version, offers a data transmission rate of 721 kbit/s. Version 3.0 HS offers a transmission rate of 24 Mbit/s. There's no correlation between Bluetooth version and Class.

Is a Bluetooth version with a lower transmission rate safer? It's possible but we don't know. There are no studies on this so we're pretty much in the dark.

What Does Science Say About Bluetooth Radiation?

The science on this issue can seem confusing. The problem is there is a huge amount of funding bias and outright manipulation of the science in order to publish studies which show favorable results. The cellphone industry is ready to spend a considerable amount of money to protect its interests. Various studies support (American Cancer Society 2008, Martinez & Burdalow 2009) the view that Bluetooth headsets when used in conjunction with cellphones decrease the overall levels of SAR exposure to the head. Whereas other studies show a diversity of hazards from these exposures.

One study found that , “men who keep cell phones in a trouser pocket in the talk mode while using a Bluetooth device may experience decreased fertility“. High-frequency electromagnetic fields can lead to a significant increase in blood pressure and affect biological processes in the body just the same as cell phones. Just two hours of exposure to high-frequency EMFs from a cell phone or Bluetooth headset, can cause irreparable DNA damage.

So to answer your questions Craig:

Does Bluetooth Drastically Reduce My Radiation Exposures Compared To Having The Cell Phone Against My Head?

Not necessarily. Research shows that Bluetooth devices that fit in or around the ear typically have a Specific Absorption Rate (SAR) of 0.23 watts per kilogram (W/Kg). Specific Absorption Rate (SAR) is the rate at which your body absorbs radiation. Compare this average Bluetooth SAR level with any website that shows cell phone SAR levels and you’ll find that some Bluetooth devices are worse than some of the low SAR cell phones.

In theory a Bluetooth device does drastically cut down radiation exposure compared to having the cell phone next to your ear if you could be sure that you were only exposing yourself to Bluetooth radiation. The problem is that when you use a Bluetooth headset that the transmission strength from the cell phone itself is not decreased. If for instance you are putting the phone in your pocket or clipping it to your belt then you are at the same time exposing your internal organs to radiation.

The Swiss Federal Office of public health recommends that cell phones should not be carried in a front trouser pocket when making calls and that it may be safest to hold the phone away from the body to reduce radiation. Studies (Whittow 2008) have also found that metallic objects situated near your waistline, such as coins, a belt buckle, rings, keys etc increased the Specific Absorption Rate (SAR) in the body at different frequencies.

Two other points are worth noting here:

  1. Bluetooth devices do not require measuring and reporting of the SAR values. So we're kept completely in the dark as to possible radiation absorption levels.
  2. The SAR measure is not a reliable safety standard. Click here to better understand this.

Does The Radiation Transmit Up The Headphone Cable That’s Physically Plugged Into The Phone?

Yes, it can. The headphone can act as a sort of antenna for your cell phone giving the radiation a fast route into your brain. The science is sketchy on this but in my view, having tried wired headphones, they are not the solution to reducing your radiation exposure. This is now widely accepted and yet wired headphones continue to be sold by the boatload to the population at large.

To overcome the antenna effect of wired headphones use an airtube hands-free kit.

Do You Have A Chart That Contrasts/Compares Methods Of Getting The Most Sound To My Ears With The Least Radiation?

I don't know of any comparative resource on this topic but to answer your question, “what’s the best way to reduce radiation when listening to streaming audio on a cell phone?”. Remember: distance is your friend.

In other words, avoid holding your cell phone next to your ear at all costs. If you do need to hold a cell phone next to your ear a Pong case can reduce your exposure.

Do cell chips offer protection from cell phone radiation?

I've tried cell phone chips, diodes and neutralizers from many different suppliers. None of the devices I've tried worked. In some cases using these devices can be more dangerous than not using them.

Low EMF Bluetooth Headsets

Despite reading all of the above if you're still committed to using a Bluetooth headset where does this leave you?

To determine how dangerous a Bluetooth device is, the best information we have to go on is the power classification, or the Class.

The worst offenders are Class 1 headsets. There are quite a few of these on the market, for instance the Callpod Dragon is a Class 1 Bluetooth headset and therefore to be avoided if radiation exposures are your main concern.

In an ideal world you'd use a Class 3 headset, which are the lowest powered headsets and therefore the safest. Unfortunately because most people's top priority is having a good strong signal Class 3 headsets are a relic of the past. That leaves us with the Class 2s.

The problem is the power classification of a headset takes some rooting out. The manufacturers are very ‘low profile' about sharing this information. I've tried contacting a few of them – most of them don't reply and the one's that do often don't know what I'm talking about.

Nevertheless I've rooted some out. Click here to see my listing of Class 2 Bluetooth headsets.

Conclusion – Are Bluetooth Head Sets Dangerous?

The frequency of Bluetooth wireless headsets is the same as that of microwave ovens. Microwave ovens use much higher power levels. But the power levels themselves are not the issue. Its the rate of change of the EMFs, the pulsing, that causes most of the biological damage. Bluetooth radiation is dangerous.

Bluetooth headsets are particularly dangerous because they are held within centimeters of the brain and they are used in conjunction with a cell phone. So you're getting double exposure. If you use Bluetooth in a car the effects are multiplied due to the Faraday cage effect.

So Craig, the bottom line is avoid Bluetooth headsets. Avoid Bluetooth radiation and practice safe cell phone use.

Some people are electrically sensitive, they can feel the effects of these exposures. But don't think that because you can't feel anything that you're not being affected by Bluetooth radiation and similar exposures. This is not what the studies are saying.

If you're not clear about the dangers of EMF to your health you might be interested in reading my extensive review of the scientific research.

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  • Craig said,

    Thanks for that detailed reply and for posting so fast!

    However, while I was looking up those airtube headsets, I couldn’t help but notice that almost everyone I saw only had a tube length of about 6-12 inches. If I understand you right, the radiation still goes to the end of the wire and the metal housing/coupling before the tube starts. Users would still be placing this ‘Live” wire next to their body … not the safe 3 feet away. Are their tube headsets with longer tube lengths.

  • Lloyd said,

    Hi Craig
    Even with an airtube you are still being exposed. You might not feel unwell, but just because you can’t feel any discomfort does not mean that it is not harming you…….but for most people using an airtube type device is a definite improvement on using Bluetooth or a wired connection.

  • Lisa McCollum said,

    I just found your site Nd have been reading. A month or so ago we had wireless Internet installed at our home that required a somewhat large antennae to. E installed on our roof. We live in a very rural part of east Texas and this is basically our only solution for fast Internet. Since installation my cell phones have been getting extremely hot, when I hold it for a long period of time I start to feel as if my insides are burning, same for my iPad. Our dog is jumpy and shakes his head and scratches his nose constantly as if something is in his ears. I feel terrible. Am I going crazy or could this antennae which is pointed at a tV news tower because that is where their transmitter is,, be causing all this?

  • Lloyd said,

    No you are not going crazy; you are showing signs of electrical sensitivity. Your reaction could be caused by the antenna itself or it could be caused by the associated WiFi. Trying switching your new installation off for 3 or 4 days and see if there is any improvement in your symptoms. Once you have identified the problem you will probably then need to deal with your sensitivity, which is not so easy but is possible, I can help you if you need it.

  • TruePure said,

    Great Article bro. Just dropping the comment to say THANKS for such detailed and seemingly impartial viewpoints.

  • junior said,

    Thanks won’t use blue tooth head set no more

  • cy said,

    @Lisa McCollum
    Any update post “Trying switching your new installation off for 3 or 4 days and see if there is any improvement in your symptoms”
    Highly curious thanks

  • Reeq said,

    Hi Lloyd,
    Thanks for all ur info, so helpful. I need some pointers i recently purchased an ipad 3 as i need to get out of my flat more (its full of other peoples wirless singlas and baby and we hate being in her brain fog) i am on a sim deal so i dont use the wireless on the ipad as i have seen it sends out huge pulses /spikes on emf readers on u tube uploads..firstly would u say that a sim is safer ? It uses the cellular connection..
    i am looking for solutions as im sensitive to emf now get dizzy etc and tingling hands. I keep it as far as possible from me when i use it as i use it to browse so am connected wen using, (apparantly the ipad wen not connected omits very little emf, so low it can be sat on ur lap independant tests showed but its so bad when connected to wireless!)

    I have purchased ‘pong radiation reduction cover fhe ipad’ seems pretty good to me, i picked up a stylus rubber tipped pen, and i use a keyboard. I need advice here, am i better to use a wired keyboard or bluetooth? of course bluetooth would be easier but emf wise for sucha thing what do u think? I was thinking of either getting a folding one or silicone that rolls up for ease of transport.

    I am also considering a grounding mat of some sort… and a screen protector too that reduces rdaiation i am sure they exist somewhere as sometimes we have no choice but to use the screen in a hurry …

    its crazy how much effort and cost we have to go to reduce all these problems why cant everything be made of wood lol with electronics inside !

  • Lloyd said,

    Using a SIM card means you will be exposed to radio frequency radiation and using the touch screen will probably mean you are being exposed to a mixture of magnetic and electric fields (the independent tests are not very relevant to someone who has symptoms of electrical sensitivity). Given your symptoms the ipad is not the ideal computer set-up. Ways to reduce your exposure might be to use an external wired keyboard and/or mouse and an extension on your SIM card, see I would not advise grounding around electrical equipment, see

  • Susan said,

    Dear Lloyd

    I am thinking of buying a new car, and most of them have bluetooth. What is your opinion of this?


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