The sensors will detect the door/window, and will be triggered to send out a signal when the door/window opening. Receiver will receive the signal and alerts. 【Easy Installation】 - Step 1: Choose a favorite ringtone and pairs the sensor and receiver.
eBay
Smart Life/Tuya App Control IP65 Waterproof WiFi Smart Lock for Front Door Security Smart Keyless Entry Door Lock with Handle
Aliexpress UK
The main function: Automatic body sensing, ultra-long, wide-angle detection. Adjustable direction (with stand). Host built-in speakers, alarm loudness of 75-95 db. Installation : No need professional personnel, easy to install yourself.
eBay
Smart Euro Cylindrical Door Lock ttlock app Keyless Security Entry Mechanical Key Waterproof fingerprint door lock For home
Aliexpress UK
1x door entry telephone 1x medal code door pad 1x hatch
eBay
5YOA No Touch Access Button Door Exit Push Switch Gate Opener - Touchless Door Access Control System for Entry Open
Aliexpress UK
Wireless Welcome Doorbell ●Shop Keeper in day time,anti-thief in the night,welcome/doorbell/alarm/color lights/lighting 5in1 multi-function ●Remote transmission range up to 280M/918ft in the open space ●8 chord music chip,40mm big horn,36 chime melodies,remember your last set melody and volume level once powered off ●Colorful LED lights,adjustable brightness,distinguish multiple entrances by different colors ●4 stages adjustable volume(Loud/High/Middle/Low)from 113-25dB ●Receiver can learn from up to 32 wireless sensors like PIR motion,magnetic or vibration sensor as well as up to 8 remote controllers. Door Window Anti-theft Alarm Using electromagnetic induction technology, easy to install. The open state, as long as the open windows and doors, the machine will send out 110db alarm.
eBay
Home Security Burglar Alarm Wireless Door Opening Alarm Anti Theft Intruder Enter House Magnetic Sensor Door Window Entry Alarm
Aliexpress UK
Depth: 55mm. Width: 85mm.
eBay
XSDTS Smart Door Lock Tuya Handle Fingerprint Key card Digital Door Lock Keypad Key Entry electronic lock Home House Apartment
Aliexpress UK
Item Type: Wireless Doorbell. Infrared Detector Battery: 3 x 3V AAA alkaline battery (not included). 1 x Infrared Detector. Transmission Reception Frequency: 433.92MHz. Wireless Distance: About 280m / 918.6ft in the open air.
eBay
Smart Door Lock Handle With Fingerprint Key card Digital Door Lock Keypad Key Entry electronic lock Mobile APP Control
Aliexpress UK
Wireless coverage up to 240m ensures you never miss an entry. 💕 【Upgrade Durability】: Our upgraded door alarm sensor boasts a robust 100,000-use lifespan after rigorous testing, outperforming competitors.
eBay
Smart Door Lock - Keyless Entry Fingerprint Lock with Digital Keypad, WiFi Electronic Door Lock featuring Anti-Peep Code
Aliexpress UK
Wireless Welcome Doorbell ●Shop Keeper in day time,anti-thief in the night,welcome/doorbell/alarm/color lights/lighting 5in1 multi-function ●Remote transmission range up to 280M/918ft in the open space ●8 chord music chip,40mm big horn,36 chime melodies,remember your last set melody and volume level once powered off ●Colorful LED lights,adjustable brightness,distinguish multiple entrances by different colors ●4 stages adjustable volume(Loud/High/Middle/Low)from 113-25dB ●Receiver can learn from up to 32 wireless sensors like PIR motion,magnetic or vibration sensor as well as up to 8 remote controllers. Door Window Anti-theft Alarm Using electromagnetic induction technology, easy to install. The open state, as long as the open windows and doors, the machine will send out 110db alarm.
eBay
Smart locks for doors keypad Door Access Control System 433MHZ Rolling Code Keypad for Entry Gate Wireless Keypad
Aliexpress UK