Handy Trends DIY Instant Perfect Window & Door Alarms - Set of 4 Workstation Security Instant Perfect Alarm (4-Pack) White. Worried about intruders into your home, office or hotel? Then protect yourself and your valuables with this easy to install alarm system. Installs in seconds, simply peel off the adhesive backing and stick in place. With a flip of a switch the alarm is activated and ready to emit an ear piercing 90 decibels alarm. 1 Year