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  • BoltBark door stop alarm
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 Rated 4.8 Excellent - Trusted By 17,000+

BoltBark ™

$119.99
$119.99
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check_circle Set the alarm to suit your room

check_circle Give deep sleepers a loud siren

check_circle Silence it with one side switch

check_circle Slip it into your bag and go

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  • Fit one 9V battery in the compartment on the underside.
  • Slide the side switch to H, M or L for your room.
  • Flip the ON/OFF switch to ON.
  • Set it behind an inward-opening door so the door meets the plate.

  • 1 door stop alarm in an English color box
  • 1 9V battery (only in the alarm plus 9V battery option)

Once your item/s is dispatched,
the estimated delivery time is:

- USA: 2-9 business days
- UK: 5-13 business days
- Australia: 5-13 business days
- Canada: 2-12 business days
- Europe: 5-13 business days

You have 90 days to return your product for a full refund (return shipping is covered by the customer; defective items ship a free replacement).

✓ Official Authorized Retailer

This product is not available on Amazon or eBay. You are purchasing directly from the only authorized seller — which means full warranty, verified authenticity, and dedicated customer support. Beware of counterfeit listings on third-party marketplaces.

BoltBark door stop alarm

BoltBark

 4.8/5
View full details

  • Over 17,000 recommend BoltBark

What Makes the Night Quieter for You

volume_up

Hear a loud siren in a quiet room

A loud siren, up to 120 dB, built to cut through a quiet room. It is very loud, so do not test it close to your ear.

tune

Match the alarm to your room (H/M/L)

Slide the switch to suit your room. L and M sense pressure, L for home and M when out, while H senses vibration.

BoltBark
shield

A plate that holds its shape

Door pressure lands on a stainless steel plate that is sturdy and resists deforming, so it keeps doing its job night after night.

layers

A base that grips wood and carpet

Textured rubber pads underneath help it hold on floor, wood and carpet. Very smooth floors such as marble or glossy tile can reduce grip.

Frequently Asked Questions

verified +347 experts reviewed it as the best choice in 2026
Q1 Does it come with the 9V battery?
It depends on the option you pick. The alarm plus 9V battery option arrives ready to use. The alarm-only option has no battery, so you add one 9V battery before your first night.
Q2 What gap under the door does it need?
Your door needs a gap of 16-28 mm (0.63-1.1 in) between its bottom edge and the floor. Measure it with a ruler before you order, so the wedge sits snugly under the door.
Q3 Will it work on carpet or hardwood?
It works on floor, wood and carpet, and the textured rubber base helps it grip. Very smooth floors like marble or glossy tile can reduce grip, so those aren't a good match.
Q4 How do I turn the alarm off?
Flip the ON/OFF slide switch on the side of the body. Find it when you first set the alarm up, so you can reach it fast in the dark, and keep your ear away when you test it.
Q5 Is it loud enough for a heavy sleeper?
It sounds up to 120 dB when the door pushes the plate. Pick L, M or H to suit your room. It can't promise to wake everyone, so test it once, keeping it well away from your ear.
Q6 Does it work on outward-opening doors?
No. It is made for inward-opening doors without a threshold. If your door opens outward or has a raised threshold, this alarm won't fit, so check before you order.
Q7 Will it stop someone from forcing the door?
No. Its main job is the automatic alarm. How well it holds the door depends on your floor, and it does not prevent forced entry. Think of it as a loud warning.
Q8 Is it light enough to pack?
It weighs about 0.3 kg (10.6 oz), packaging may be included, and it slips into a bag or purse. It is made for travel, hotels, rentals, offices and home.
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