Some Marriott-branded hotels have installed in-room HALO smart sensors that contain microphones capable of recognizing distress keywords, aggression, gunshots and sound levels. Some versions can even detect motion and count occupants.
Concerned guests are worried this amounts to Marriott “bugging” rooms and potentially tracking guests without disclosure. But while some of these devices appear to have that capability, it doesn’t appear to be a Marriott-wide initiative, it’s not clear that those hotels installing the devices have enabled these features, or that anyone is recording or listening to conversations.
It’s still the antithesis of the experience offered to a guest, it shouldn’t be allowed by the brand, and it’s concerning hotels don’t share more information about the devices and how they’re being used.
Some Marriott properties are tracking you in your room- Spoken keyword, sound levels, occupant and people counter –
by
u/willwork4pii in
marriott
The HALO 3C that appears to be at issue classifies air, sound and occupancy data and sends back events (not recordings). However, it seems to contain two microphones and has been hackable in the past (Motorola patched a critical vulnerability last year). Mostly, these have been responsible for billing customers $250 – $600 in smoking charges even when guests never smoked in their room.
The distributor, by the way, acknowledges that steam, perfume and cleaning chemicals can produce false positives. HALO tells hotels that the system can increase revenue from smoking fees. Triton actually promises “over 400% more revenue” and six figures of additional fee revenue while helping hotels win chargebacks.
We’ve seen reports of devices at:
- Beverly Hills Marriott named in the Reddit thread, but I haven’t seen other confirmation or details of the specific device.
- Sheraton Mission Valley San Diego named for a $250 vaping charge while another review reports $500. A review response on Marriott’s site indicates that the devices are managed by a third party and the hotel receives daily reading reports.
- The Laylow Waikiki The hotel’s website discloses “smoke-sensitive sensors” in rooms and a $350 fee.
- Westin Las Vegas There are numerous $400 – $500 false-positive smoke complaints. Commenters generally mention Triton’s 3D Sense system rather than HALO. h
- Sheraton Jacksonville a guest photographed a plug-in device and matched it to a FreshAir sensor, not HALO.
- Le Méridien Fort Worth Downtown The hotel was reportedly piloting an automatic third-party air-quality detection system.
There are various allegations about the JW Marriott Indianapolis, Renaissance Palm Springs, Houston Marriott Sugar Land, Westin Arlington, Courtyard Montvale, Courtyard Boston Cambridge and Courtyard Phoenix Mesa Gateway.
But the especially concerning device – that is more than just a smoke detector scamming guests for cleaning fees they do not owe – seems to be the HALO 3C/3C-PC, made by IPVideo, which is owned by Motorola Solutions. It is a network-connected, ceiling-mounted sensor that can:
- Detect air events: vaping, THC, cigarette smoke, and attempted masking with sprays or perfume. It measures CO, CO₂, VOCs, NO₂, temperature, humidity, light and air-quality indices.
- Analyze sound: two microphones measure sound levels and classify possible aggression, screaming, gunshots and preconfigured distress phrases such as “Help, 911.” These are responses to specific phrases and not general transcription of guest conversation.
- Detect movement: which can be useful for auto-shutoff of lights and air conditioning.
- Count people: using body heat sensing rather than a camera, counting up to nine people in 196 square feet, and sends an alert when an occupancy threshold is exceeded.
Guests seem to be concerned that hotels are recording every conversation, but that doesn’t seem to be the case – audio gets digitized, classified, but doesn’t get retained or sent to the hotel if a trigger word isn’t used. The device is “listening” but not really recording or transmitting conversations.
Nonetheless, the device could be turned into a bug. That’s actually been done. But there’s no indication it’s being done in practice at hotels. My view is simple – that a microphone should not be installed in a hotel room at all.
But if they’re going to install them I might start musing out loud, “I’m going to status match with Hilton” and maybe I’ll stand a better chance of an upgrade.
I’ve warned that AI scans could soon monitor every move you make in your room after a guest was fined $500 for misuing a hair dryer. And you now have to be really vigilant, just like you need to check your Airbnb for hidden cameras.
They may hear people talking about how awful Bonvoy is.
Super easy way to resolve this – set your laptop to udder all their keywords with gunshot sounds in between on a loop, turn up the volume, about your business. Once the hotels start getting fines from a municipality for false alarms, you can be absolutely sure those devices will be removed immediately.
You can google the keywords – The HALO even supports multiple languages!
I can’t believe this is legal in the litigious US without signing a waiver. I suspect lawsuits incoming soon.
It’s always a Marriott.
Everyone’s first instinct will likely be to call this an illegal wiretap, but the law is murkier than that. The constitutional privacy cases people vaguely remember apply to government action, not to a private hotel operator. The closest real-world comparison is the litigation over Google’s voice assistants. There, audio was actually recorded, sent to Google, stored and, in some cases, played back for human reviewers. Even with those facts, the plaintiffs initially had their claims dismissed because they could not identify specific private conversations that had been captured. Later, parts of the class case also ran into individualized questions such as where each conversation happened, who was present and what notice each person had. A sensor that classifies sounds in real time without recording or transmitting anything presents a genuinely open legal question.
Where hotels may be most vulnerable is actually notice and consent. California generally requires everyone involved to consent before a confidential conversation is electronically recorded or eavesdropped upon. Consent can sometimes be implied from adequate warnings, but a webpage the guest never encounters while booking, particularly one that mentions smoke detection while saying nothing about speech analysis, is a flimsy foundation for claiming that anyone agreed to anything. California law also provides statutory damages, which gives plaintiffs’ lawyers a strong incentive to test the issue.
But here’s the big paradox: the microphones are what most alarm people, but the smoking fees may produce the stronger lawsuit. A $500 charge is a concrete, documented financial injury, far easier to prove than what a sensor may have overheard. The catch is that a successful case would require considerable discipline. Gary’s reporting here describes at least three products from different manufacturers at different hotels, with no evidence of a brand-wide Marriott program. There is also the familiar hotel-industry maze in which the building owner, the management company and Marriott itself may all be separate entities. The realistic lawsuit is therefore not simply “guests versus Marriott.” It is one property, one device and one fee policy, followed first by fights over the proper defendant and whether contractual fine print forces each guest into individual arbitration.
Within that narrower frame, there may be a real case against a hotel that mechanically converts sensor alerts into smoking charges without meaningful independent verification. But the evidence must remain specific to the device actually installed. One manufacturer markets its system to hotels as a revenue generator, promising more than 400% growth in fee income. That may say a great deal about why the system is purchased, but nothing by itself about whether any particular alert was accurate. The company marketing the microphone-equipped HALO sensor separately warns that steam, perfume and cleaning chemicals can cause false positives (although it claims newer devices are designed to reduce that risk).
I think the hotels will eventually live to regret all of this. My prediction over the longer term is quiet removals, revised brand standards and confidential settlements, hotel by hotel.
^Mike, that’s a lot of legalese to sane-wash what is simply some creepy stuff. Let’s just call it what it is… Bonvoy’d.
That’s not incredibly creepy at all.
“Guests seem to be concerned that hotels are recording every conversation, but that doesn’t seem to be the case ”
Never trust, particularly if it’s not illegal. These companies exist to monetize everything they can
I need some clarification on this, how does one misuse a hair dryer? And to the extent that the hotel values the hair dryer at $500 or was that Bonvoy points?
@ 1990 Good to see you appreciate brevity
@One Trippe — I’m down for whatever. Short-haul, long-haul. Mike was hopping on SQ23 for 19+ hours between JFK-SIN, when all we really needed was the quick ‘shuttle’ from LGA-DCA for this. “Bonvoy’d.”
And here I thought the car rental damage scanners/billing scams were about as low as corporations would go …… This clearly is more personally invasive & despicable in the ANALS
of corporate greed …..
Not sure what is more worrisome ? The fact that a corporation is doing this OR the reality that based on the responses in this thread, people are more or less taking it in their stride.
Run the you filthy animals tape from home alone movie