Korner is a home security system that costs under $100 and doesn't require you to pay monthly fees, but still goes a long way towards securing your home and guaranteeing your safety and security.
The Korner system consists of a curved motion-detecting tag that can be inserted into the upper corner of door and window frames, and a fob that is plugged into the Ethernet port of the user's Internet router.
If the tag detects movement, it sends a wireless message to the fob. The fob then responds by emitting a high-pitched audio alarm and by notifying the user via an accompanying iOS or Android app.
The user can then use that app to contact the police, forward the alert or alert someone else for help.