Updated · Published July 19, 2026
STI Exit Stopper Door Alarm Review (2026)
An in-depth review of the STI-6400 Exit Stopper door alarm for dementia wandering — the 105 dB alert, key override, and the ethical question of alarming a door someone may need to use.
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STI-6400 Exit Stopper Multifunction Door Alarm
Verdict: A loud, reliable answer to night-time wandering, with a key override so the door stays usable by everyone else in the house.
Best for: memory care units, group homes, high wandering risk.
Wandering is the risk that keeps families awake, and it is one of the more common reasons a person moves into residential care. A door alarm does not prevent it. What it does is convert a silent departure at 3am into something a carer sleeping upstairs actually hears, which is often the difference that keeps someone at home.
Why it works for seniors
Volume is the specification that decides whether it works. Many door chimes are audible in the same room and inaudible through a closed door two floors up, which is precisely when they need to work. At 105 decibels this is closer to a smoke alarm than a doorbell.
The key override is what stops it being disabled. On a shared front or back door, an alarm without a bypass gets triggered constantly by everyone else in the house and is switched off within days. A carer who can pass silently leaves the alarm armed for the person it is watching.
Battery power and door mounting mean it goes up in minutes with no wiring, no socket and nothing permanent, which matters in rented homes and for a situation that may change within months.
Specifications
Specifications
| Type | Exit stopper |
|---|---|
| Volume | 105 dB |
| Override | Key |
| Power | 9V battery |
Pros and cons
Pros
- 105 dB carries through a closed bedroom door
- Key override keeps the door usable without disarming it
- No wiring, no socket, no permanent fixing
- Mounts and removes in minutes
- Also usable as a general exit alert on a back door
Cons
- 9V battery with no low-battery warning
- The alarm itself can distress a confused person
- Alerts only, it does not delay or prevent an exit
Who it's best for
Best for
Households managing night-time wandering where a carer sleeps in the same building and needs to be woken reliably.
Skip it if
Nobody is home overnight to respond. An alarm sounding in an empty house achieves nothing, and that situation needs a monitored solution and a care assessment rather than a door alarm.
Alerting is not confining
This device tells you a door opened. It cannot stop anyone leaving, and it is not a substitute for a safeguarding plan. If wandering is escalating, involve the GP or care team rather than adding more alarms.
Alternatives worth considering
- Want a gentler alert? A wireless chime pages a carer without a siren — see our door alarm roundup.
- Person lives alone? A monitored alert system reaches someone outside the house.
- Night-time confusion is the root cause? A day clock sometimes reduces the wandering itself.
The verdict
For a household with a carer present overnight, this does the job properly: loud enough to wake someone, and bypassable so it does not get disabled out of frustration. Go in clear-eyed about what it is, though. It is an alert, not a lock, and the decision to alarm someone's door deserves a conversation rather than just a purchase.
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