Filters
Price
Pricing
Shipping
Condition
Store
Brand
Sports Type
Department
Toy Category
Colour
Material
Fishing
Clear all filters

Save big on Sale Bargains - Up to 82% off on Door Open Alarm

TODAY'S BEST DEALS
TOP DEAL
Door Window Open Alarm Wireless Intruder Magnetic Sensor Contact With on off key
Door Window Open Alarm Wireless Intruder Magnetic Sensor Contact With on off key
eBay
£7.95
SEE DETAILS
Popular
Door Window Open Alarm Wireless Intruder Magnetic Sensor Contact With on off key
Door Window Open Alarm Wireless Intruder Magnetic Sensor Contact With on off key
eBay
£7.95
SEE DETAILS
Featured
Magnetic Door & Window Open Alarm (Pack of 3)
Magnetic Door & Window Open Alarm (Pack of 3)
eBay
£9.14
SEE DETAILS
Featured
Voice Alarm Door/Window Open Sensor
Voice Alarm Door/Window Open Sensor
eBay
£12.90
SEE DETAILS
Featured
Magnetic Door and Window Open Alarm - Pack of 3
Magnetic Door and Window Open Alarm - Pack of 3
eBay
£8.92
SEE DETAILS
Featured
HOMESAFE DOOR GUARD ALARM ALERT DOOR OPEN INTRUDER VISITOR CHIME
HOMESAFE DOOR GUARD ALARM ALERT DOOR OPEN INTRUDER VISITOR CHIME
eBay
£19.99
SEE DETAILS
Popular
MINI ENTRYD DOOR WINDOW ALARM OPEN MAGNETIC SWITCH TO TRIGGER INSTANT LOUD ALERT
MINI ENTRYD DOOR WINDOW ALARM OPEN MAGNETIC SWITCH TO TRIGGER INSTANT LOUD ALERT
eBay
£9.99
SEE DETAILS
Normally Open Recessed Door Window Contact Magnet Alarm Reed Switch
Normally Open Recessed Door Window Contact Magnet Alarm Reed Switch
£2.96
eBay
Info
B1A-WIRELESS DOOR & WINDOW OPEN ALARM ALERT/ DOOR OPEN CHIME
B1A-WIRELESS DOOR & WINDOW OPEN ALARM ALERT/ DOOR OPEN CHIME
£29.99
eBay
Info
Normally OPEN Window Door Contact Magnetic Switch Alarm with Wire
Normally OPEN Window Door Contact Magnetic Switch Alarm with Wire
£1.38
eBay
Info
Nissan 350Z Door Shut Open Close Interior Alarm Light Switch Sensor
Nissan 350Z Door Shut Open Close Interior Alarm Light Switch Sensor
£9.95
eBay
Info
NRS Healthcare Voice Alarm Door/Window Open Sensor
NRS Healthcare Voice Alarm Door/Window Open Sensor
£16.18
eBay
Info
SWANN WIRED ALARM DOOR WINDOW CONTACT MAGNETIC SENSOR OPEN ALARM HOME SAFETY
SWANN WIRED ALARM DOOR WINDOW CONTACT MAGNETIC SENSOR OPEN ALARM HOME SAFETY
£9.99
eBay
Info
SWANN WIRELESS ALARM DOOR WINDOW CONTACT MAGNETIC SENSOR OPEN ALARM HOME SAFETY
SWANN WIRELESS ALARM DOOR WINDOW CONTACT MAGNETIC SENSOR OPEN ALARM HOME SAFETY
£14.99
eBay
Info
Door Window Contact Magnetic Switch Alarm Home Safety - Normal Open SMD
Door Window Contact Magnetic Switch Alarm Home Safety - Normal Open SMD
£2.15
eBay
Info
Door Window Contact Magnetic Reed Switch Alarm - Normal Open NO SMD Style
Door Window Contact Magnetic Reed Switch Alarm - Normal Open NO SMD Style
£1.95
eBay
Info
3pcs NO normally open Wired Security Alarm door magnetic contact reed switch BF
3pcs NO normally open Wired Security Alarm door magnetic contact reed switch BF
£3.45
eBay
Info
Door Or Window Contact Magnetic Reed Switch Alarm - Normal Open SMD Style
Door Or Window Contact Magnetic Reed Switch Alarm - Normal Open SMD Style
£2.15
eBay
Info
GSM LBS Tracker Smart Door Alarm Support Open / Close Door / Low Battery Alarm
GSM LBS Tracker Smart Door Alarm Support Open / Close Door / Low Battery Alarm
£15.09
eBay
Info
Normally Open NO Magnetic Rolling Gate Door Contact Reed Switch Alarm Security
Normally Open NO Magnetic Rolling Gate Door Contact Reed Switch Alarm Security
£12.62
eBay
Info
B1B-TWIN WIRELESS DOOR & WINDOW OPEN GARAGE/SHED/CARAVAN/ ALARM ALERTCHIME
B1B-TWIN WIRELESS DOOR & WINDOW OPEN GARAGE/SHED/CARAVAN/ ALARM ALERTCHIME
£39.99
eBay
Info
KS 3pcs NO normally open Wired Security Alarm door magnetic contact reed switch
KS 3pcs NO normally open Wired Security Alarm door magnetic contact reed switch
£3.39
eBay
Info
10X (3pcs NO normally open Wired Security Alarm door magnetic contact reed sw DP
10X (3pcs NO normally open Wired Security Alarm door magnetic contact reed sw DP
£28.58
eBay
Info
20X (3pcs NO normally open Wired Security Alarm door magnetic contact reed sw DP
20X (3pcs NO normally open Wired Security Alarm door magnetic contact reed sw DP
£54.14
eBay
Info
GSM Real Time Tracker & Smart Door Alarm with Open / Close Door Alarm Function
GSM Real Time Tracker & Smart Door Alarm with Open / Close Door Alarm Function
£18.65
eBay
Info
B1A- NEW WIRELESS SECURITY SHOP DOOR OPEN ALERT ALARM SYSTEM WITH WIRELESS CHIME
B1A- NEW WIRELESS SECURITY SHOP DOOR OPEN ALERT ALARM SYSTEM WITH WIRELESS CHIME
£29.99
eBay
Info
30 Pcs Normal Open Wired Magnetic Door Window Contact Reed Switch Alarm
30 Pcs Normal Open Wired Magnetic Door Window Contact Reed Switch Alarm
£23.66
eBay
Info
WIRELESS Garage Shed Caravan SHOP DOOR Open ALERT Portable ALARM CHIME
WIRELESS Garage Shed Caravan SHOP DOOR Open ALERT Portable ALARM CHIME
£29.99
eBay
Info
5 Pcs Door Window Magnetic Switch Home Alarm Security System NO Normally Open
5 Pcs Door Window Magnetic Switch Home Alarm Security System NO Normally Open
£5.19
eBay
Info
1 Set Door/Window Contact Magnetic Reed Switch Alarm Sensor Normally Open/Close
1 Set Door/Window Contact Magnetic Reed Switch Alarm Sensor Normally Open/Close
£1.19
eBay
Info
1 Set Door/Window Contact Magnetic Reed Switch Alarm Sensor Normally Open/Close
1 Set Door/Window Contact Magnetic Reed Switch Alarm Sensor Normally Open/Close
£1.19
eBay
Info
B1A WIRELESS Garage Shed Caravan SHOP DOOR Open ALERT Portable ALARM CHIME
B1A WIRELESS Garage Shed Caravan SHOP DOOR Open ALERT Portable ALARM CHIME
£29.99
eBay
Info
5PC Magnetic Reed Switch Normally Open Closed NC NO Door Contact Alarm Security
5PC Magnetic Reed Switch Normally Open Closed NC NO Door Contact Alarm Security
£14.99
eBay
Info
3x 23*22mm Wired Magnetic Sensor Door Alarm System Detector Window Switch Open
3x 23*22mm Wired Magnetic Sensor Door Alarm System Detector Window Switch Open
£5.29
eBay
Info
CHIME SOUNDER FOR WIRELESS B1AA-NEW WIRELESS SECURITY SHOP DOOR OPEN ALERT ALARM
CHIME SOUNDER FOR WIRELESS B1AA-NEW WIRELESS SECURITY SHOP DOOR OPEN ALERT ALARM
£15.00
eBay
Info
Door Handle Alarm. Detects Door Opening & Sounds Alarm
Door Handle Alarm. Detects Door Opening & Sounds Alarm
£7.99
eBay
Info
DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY
DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY
£22.00
eBay
Info
DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY
DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY
£17.50
eBay
Info
DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY
DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY
£6.50
eBay
Info
DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY
DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY
£28.00
eBay
Info
DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY
DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY
£25.00
eBay
Info
DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY
DOOR HANDLE/KNOB ALARM / INTRUDER ALARM. DETECTS DOOR OPENING. ADJ SENSITIVITY
£12.00
eBay
Info
Spy Gear Door Alarm
Spy Gear Door Alarm
£16.99
Argos.co.uk
Info
Magnetic Opening Detector Door Window Alarm Home Security BF
Magnetic Opening Detector Door Window Alarm Home Security BF
£1.46
eBay
Info
Alarm magnetic wireless detector opening window door 90 dB garage
Alarm magnetic wireless detector opening window door 90 dB garage
£2.39
eBay
Info
Magnetic Opening Detector Door Window Alarm Home Security  FREE DELIVERY
Magnetic Opening Detector Door Window Alarm Home Security FREE DELIVERY
£2.15
eBay
Info
Magnetic Opening Detector Door Window Alarm Home Security  PK
Magnetic Opening Detector Door Window Alarm Home Security PK
£1.44
eBay
Info
Magnetic Opening Detector Door Window Alarm Home Security DT
Magnetic Opening Detector Door Window Alarm Home Security DT
£1.82
eBay
Info
Friedland MA10 Wirefree Door Stop Intruder Alarm Sounds When Door Opens
Friedland MA10 Wirefree Door Stop Intruder Alarm Sounds When Door Opens
£12.99
eBay
Info
Energenie Mi Home Wireless Open Window/Door Sensor
Energenie Mi Home Wireless Open Window/Door Sensor
£27.99
Argos.co.uk
Info
10X (Magnetic Opening Detector Door Window Alarm Home Security  PK DP
10X (Magnetic Opening Detector Door Window Alarm Home Security PK DP
£11.51
eBay
Info
10X(Magnetic Opening Detector Door Window Alarm Home Security BF
10X(Magnetic Opening Detector Door Window Alarm Home Security BF
£12.08
eBay
Info
5x(Magnetic Opening Detector Door Window Alarm Home Security BF
5x(Magnetic Opening Detector Door Window Alarm Home Security BF
£6.26
eBay
Info
5X(Magnetic Opening Detector Door Window Alarm Home Security T8
5X(Magnetic Opening Detector Door Window Alarm Home Security T8
£6.16
eBay
Info
20X (Magnetic Opening Detector Door Window Alarm Home Security  PK DP
20X (Magnetic Opening Detector Door Window Alarm Home Security PK DP
£18.09
eBay
Info
20X(Magnetic Opening Detector Door Window Alarm Home Security)SR
20X(Magnetic Opening Detector Door Window Alarm Home Security)SR
£18.91
eBay
Info
10X(Magnetic Opening Detector Door Window Alarm Home Security)PA
10X(Magnetic Opening Detector Door Window Alarm Home Security)PA
£12.13
eBay
Info