It sounds a 125dB siren for 20 seconds, repeating if necessary. When a thief touches the door, the door lock will sense the force and generate an alarm. The alarm lasts for 20 seconds, making the thief unable to achieve his goal.
eBay
Wireless Wifi Doorbell Camera 1080P Video Intercom Doorbell Waterproof 4.3in IPS Screen Home Security Door Bell IR Night Vision
Aliexpress UK
Can be used as a doorstop when power switch is turned off. 1 Door Stop Alarm. Battery: 1 9V battery(Excluded ). No installation required, easy for travelers to carry. If you are satisfied with our service, pls.
eBay
Wireless Wifi Doorbell Camera 1080P Video Intercom Doorbell Waterproof 4.3in IPS Screen Home Security Door Bell IR Night Vision
Aliexpress UK
Wireless Door Window Magnetic Sensor Security Alarm Kit. Response in 200ms. Door/Window Security Alarm Kit. The double-sided stickers on the back allow you to easily paste this alarm kit onto any smooth surface.
eBay
4.3in IPS Screen Wireless Wifi Doorbell Camera 1080P Video Intercom Doorbell Waterproof Home Security Door Bell IR Night Vision
Aliexpress UK
The 10PCS Magnetic Wireless Security Window Door Entry Burglar Alarm Device Sensor is a set of magnetic sensors designed to detect entry into your home. These sensors are connected to a home security system and will trigger an alarm if someone tries to enter your house without your permission. The sensors are wireless and can be easily installed on windows or doors. They are equipped with a sound alarm feature to alert you if someone is attempting to break into your home. Made in China, these sensors are a reliable and effective way to enhance the security of your home.
eBay
Wireless Door Window Vibration Sensor Alarm 125dB Glass Breakage Anti-theft Sensor Remote Alarm For Home Safety Protection
Aliexpress UK
Can be used as a door stop alarm and door stopper, A protector around you. Just put the door stop security Alarm under the door and turn on the switch. It is the high damping rubber at the bottom which can prevent the door sliding.
eBay
KERUI W181 Alarm System Secutrity Home WIFI GSM Alarm Tuya Smart Motion Detector Door Sensor Burglar IP Camera Work Alexa Google
Aliexpress UK
Model: Security Keypad Door Alarm System. 2PcsOR 1Pcs Security Keypad Door Alarm System as per your order. Connectivity: Wireless. You don’t worry other people intrude your house when power off. Power Source: Battery.
eBay
Wedge-shaped Alarm Anti-theft Door Stopper Block Alarm Wireless Stainless Steel Cover Small Sensitivity Portable for Apartment
Aliexpress UK
Low power consumption, long battery life. Adjustable detecting distance. Low power indication.
eBay
2PCS Security Furniture Locks Hardware Cam Lock For Security Door Cabinet Mailbox Drawer Cupboard Locker With 2 Keys
Aliexpress UK
Sounds 120dB siren when the door is pushed. Eagle Door Stop Alarm x 2.
eBay
EWelink ZigBee Door Window Sensor Smart Home Wireless Door Open Close Detector APP Remote Alarm Works with Alexa Google Home Z2M
Aliexpress UK