Compact yet highly effective, it instantly notifies you and deters intruders when your alarm is triggered. 🔊120 dB Powerful Sound – Extra loud siren quickly alerts you, neighbors, and deters intruders.
eBay
Staniot Wireless Alarm Security Keypad Built-in 1500mAh Battery Anti-dismantling Alarm RFID Tag for Home Security Alarm System
Aliexpress UK
External wired alarm connectors: 1 channel external wireless siren, 1 channel. Siren output：<500mA. GSM system：850/900/1800/1900MHz. Support the alarm such as battery problem, low power battery anti-pry alarm etc.
eBay
Staniot Wireless Alarm Security Keypad Built-in 1500mAh Battery Anti-dismantling Alarm RFID Tag for Home Security Alarm System
Aliexpress UK
One Set Of Tuya Alarm Host A External wired alarm connectors: 1 channel external wireless siren, 1 channel. Siren output：<500mA. Support low power for wireless parts, Tamper alarm function. GSM system：850/900/1800/1900MHz.
eBay
Wireless Door Stop Alarm System120dB With Door Lock Home Security Kit Anti-Theft Alarm System Portable Door Stoppers Alarm Siren
Aliexpress UK
2- Support 4G and WIFI. 4- Support 3 wired defense zones. 11- Support 5 sets of alarm phone settings, with separate settings for alarm SMS switch and dialing switch. 12- Support 20 second alarm recording SMS.
eBay
Mini Wireless Alarm Door Stop Alarm 120dB Great for Home Wedge Shaped Stopper Alert Security System Block Blocking System
Aliexpress UK
eBay
3-1PC Mini Wireless Alarm Door Stop Alarm 120dB Great for Home Wedge Shaped Stopper Alert Security System Block Blocking System
Aliexpress UK
External wired alarm connectors: 1 channel external wireless siren, 1 channel. Siren output：<500mA. GSM system：850/900/1800/1900MHz. Support the alarm such as battery problem, low power battery anti-pry alarm etc.
eBay
1Pair Home Alarm Wired Rolling Door Alarm Magnetic Switch Window Metal Door Max 70mm Work Distance Open Control Door Sensor
Aliexpress UK
The PIR sensor is a wide angle 10.6mX10.6m with high catch performance and false alarm immunity. 1 Wired PIR Motion Sensor. Wide Detector Angle: 110° (10.6mX10.6m). chip, anti-EMI & anti-RFI design.
eBay
WiFi/Zigbee Water Sensor Tuya Leakage Alarm Flood Leak Detector Smart Home Life APP Water Alert Overflow Alarm Security System
Aliexpress UK
SCARE BURGLAR AWAY When someone trigger this system that will be alarm to scare thief away and also will make a phone or sending a message to someone which you save the phone number on the main unit BUILT-IN BATTERY This system work well when someone cut wires or power off. You don’t worry other people intrude your house when power off REMOTE CONTROL You can control this gsm alarm system Arm/Disarm/Voice Monitoring /Intercom by cellphone anywhere EMERGENCY HELP You can press an alarm button on the remote control when some emergency thing happen, this system will go off right now and will make a phone CELLPHONE FUNCTION This main unit can make the phones like a cellphone so this also is a spare mobile phone
eBay
KERUI WiFi/4G GSM Burglar Alarm with 7 Inch Large IPS Touch Screen for Home Security Alarm System with Siren Motion Sensor G70
Aliexpress UK