Barracuda Intruder Defense System Model DSI for Inward Swinging Doors Discontinued 3X lens magnification 29755 3X lens magnification the Omron IntelliSense Professional Digital Blood Pressure Monitor is designed for clinical use in a professional setting including a nurse’s office (Model DSI Fits 5 3 4" Jam) The user places the device on the floor and slides the metal plates under the door The Barracuda Intruder Defense System is helping keep classrooms and public buildings safe in the event of an active shooter situation it is a security device that can be installed in a matter of seconds in emergency situations to protect occupants against intruders