Open the door and see if the siren sounds. 1/2/4/10X Alarm Kit (alarm unit & magnetic sensor). Sensor type: alarm. Alarm type: sound. When checking the settings, turn the host switch to the "ON" position.
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40mm Mini Metal Alarm Clock Portable Home Outdoor Lovely Cartoon Watch Retro Gift for Children Friends Metal Alarm Clock
Aliexpress UK
eBay
Battery Alarm Clock Small Alarm Clock With Night Light Simple bedside Creative Clock For Children Personalized Bedroom Clock
Aliexpress UK
This alarm is the perfect way to protecting your home or place of business against theft. The alarm function is triggered using a magnetic sensor or using the provided remote control. You can arm, disarm, sound alarm and change to the doorbell function using the remote. This is ideal for shops and offices. The 110 decibel alarm is perfect on windows, doors and sheds to protect your goods. Features: 100% brand new and high quality Super loud 110 dB alarm Convenience in installation, just peel and stick Super environmental suitability and stability Dustproof and insect prevention Easily mounted by adhesive Ideal entry warning for homes, apartments, mobile homes and more.
eBay
ORIA Loud Alarm Clock with Bed Shaker Vibrating Alarm Clock with Adjustable Dimmer for Heavy Sleeper Deaf Hard of Hearing
Aliexpress UK
♥【Transmitters or Receivers are Expandable】When the door/window opens,the sensor will be triggered to send out a signal,the receiver will receive the signal and alert. The transmitter is battery-powered (battery included), the sensor and magnet can be fixed with double-sided tape (included).
eBay
1pc student-only bedroom table alarm clock; 3-inch early education small alarm clock; Room/home décor
Aliexpress UK
For peace of mind in anyones home, these loud battery operated alarms are a must. Simple to attach to any window or door using the self adhesive backing provided and has a simple On/Off switch to the side. Once an attempted forced entry is made on a window or door the alarm will detect unusual vibrations made by the intruder and will activate, emitting a high pitched 95dB sound. Each purchase buys you TWO alarms. Each alarm requires 3 x LR44 button cell batteries (not included). They may come with batteries but they may be past their shelf life so you must use new batteries upon receipt. Dimensions are approx. 6cm in diameter and 2cm in thickness.
eBay
ORIA Digital Alarm Clock LCD Display Travel Alarm Clock Small Digital Clock With Calendar Temperature Battery Operated Clocks
Aliexpress UK
Product Code HSA6010. Suitable for Yale HSA6000 wireless security alarm systems. For indoor use only. Pet Friendly. Image for illustration purposes only.
eBay
Mini Digital Alarm Clock TEMP Humidity Dual Alarm Timing Countdown Backlight Snooze Table Clock 12/24H Battery Powered LCD Clock
Aliexpress UK
3 Wireless PIR Motion Detector with 9V Battery. The host supports up to 30pcs wireless detectors, 8pcs remote key fobs, 4 doorbell buttons. 2 Wireless Remote Key Fobs with 23A 12V Battery. 2 Wireless Door Sensors with 23A 12V Battery.
eBay
Large Digital Wall Clock TEMP Date Week Display 2 Alarms Battery Powered Snooze Table Clock 12/24H Electronic LCD Alarm Clock
Aliexpress UK
Plug & Play system with Built-in Door sensor and Siren. Simply attach the fixing plate to wall. It detects door opening. 📢 Built-in Indoor Siren. 🔔 Get Instant siren Alerts for unauthorized door opening.
eBay
Vintage Night Light Alarm Clock European Retro Metal Alarm Clock Bedside Mute Needle Table Clock Gets Bed Ringing Bell Room
Aliexpress UK