Switch off WiFi and Bluetooth PERMANENTLY from Sonos One

Just have found another interesting piece for this thread. Reading next devices manuals, looking for one with BT off switching, there is a sentence: 

“About Bluetooth communications
Radio waves broadcast from this unit may interfere with the operation of medical devices. Make sure you turn off the power of this unit and Bluetooth device in the following locations as radio wave interference may cause malfunctions.
- Hospitals, trains, aircraft, petrol kiosks, and places where flammable gases are generated
- Near automatic doors and fire alarm”

So many potential clients are excluded this way. The possibility of switching off BT would stop their protests with banners “Network speakers for everyone!”, “Ethernet rulez!”  ;-)

Who knows :-) 

I've noticed that manufacturers don't like to brag about the transmitters they put in their devices. Here is the source of the instructions for the equipment I wrote about (not cheap one):
https://assets.denon.com/documentmaster/master/ceol_n12_owners-manual-eu-en.pdf
Interestingly, the fine print in this manual states that you must turn on Bluetooth on your phone if you use the phone app to control the device (HEOS app). It's unclear whether it's only during installation or all the time, but from the description it looks like it's all the time...
There are probably some meters to measure whether the device is transmitting something and I would gladly buy it, but they are probably expensive toys.

I did find this tool. I cannot vouch for its accuracy or effectiveness.

Let me share the knowledge I collected after some research:

- as Sonos support answered to me, One SL, One (Gen 2), Five, Sub (Gen 3) products utilize Bluetooth low energy (BLE) during setup. After the speaker are set up, the BLE is stopped, you can connect the Sonos devices via Ethernet cables and then disable the WIFI from the Sonos app for the Sonos products and they will work only on the Ethernet connection. I was looking at One SL - it really has a special button to press only during the initial setup
- new Sonos models (as production of One SL has just stopped) for example Era 100/Era 300 have no BLE, we can use an external USB C Ethernet adapter (additional cost) to work wired. After the setup, we can disable the WIFI from the devices and they will only work on the Ethernet connection. The Bluetooth is disabled by default, to start the Bluetooth setup on the Era 100/300 we will need to press and hold the Bluetooth button on the back of your Era until we hear a chime. The front status LED will start flashing blue, and then the speaker will start to search for nearby Bluetooth speakers.
- there is another company - Bluesound, for example, their speakers (Pulse Flex 2i), are nice, with the possibility to add a battery “back bag” - making it movable. We can switch Bluetooth/WiFi off in options.
- Denon speakers - no way to get human support, they send me links to FAQ or AI-prepared answers. No Bluetooth off option in the app, they use a “sleeping” system, but how it works is described very lapidary (probably we always have to wait 20 min for “sleep” Bluetooth/WiFi)
So, the Bluesound options seem to be ideal, but the speakers are expensive. Sonos Era 100 plus Ethernet dongle - also expensive. Sonos One SL - model, from 2018, not produced starting this year and how to check if BLE is off indeed? (any way - very attractive economically) 

I have also found a Erickhill ER02 electro-emission meter - I would like to make sure, that all the above is true in real life, but I do not know if this meter will be suitable to measure that. Maybe someone knows?

If you are concerned about “emission for hours every day, close to your head”, I strongly suggest you refrain from buying any WiFi speakers; regardless if they allow you to turn Bluetooth off or not.  Also stay away from cell phones, microwaves, plane rides, sunshine, walks outdoors, and other activities which expose you to EMF levels which exceed that of BLE by tens of thousands to millions of times. 

I'm serious.  Being worried about BLE and not those far more powerful sources of the same type of EMF radiation is like being worried about red dye in one M&M while smoking 2 packs a day, drinking irradiated barium shakes for every meal, getting chest X-Rays for fun, and taking your biannual month long trips to sunny Chernobyl.

I have Bluetooth LE hearing aids, stuck behind each ear for about 18 hours per day. Looking at RF total exposure levels they are still likely lower than the 2.4 & 5 GHz access point I’m five feet from, my tablet that is in my hands several hours a day or the cell phone I’m usually three feet from unless it is in a pocket.

If you are serious you need to prioritize the RF issues and solve the worst ones first.

Anybody who is so obviously unaffected that they can carelessly throw $200+ of electronics in the trash, and yet are angry enough to bother to register here and say so in their very first post, should be ignored.  

Yeah, $3,000+ listing, both S1 and S2, first ever post.  It's much easier to spot when they try too hard.