VisorTech Wireless Connection, Alarm System PIR Door/Window Alarm : Amazon.de: DIY & Tools
KOMBIALARM compact - Made in Germany - AMS Messtechnik
X-Sense Smart Home Base Station - Compact Alarm System, Requires 2.4GHz Wi-Fi, with 2-in-1 Button for Mute/Pairing, Remote Monitoring and Control, Model SBS50 : Amazon.de: DIY & Tools