Two Types of Protection in One Product. The 5819S wireless combination magnetic contact and shock sensor provides two types of protection in one product and offers more protection at every point. As a standard magnetic contact, it can detect open and closed conditions of doors and windows. It also has built in shock sensing technology that can detect abrupt, forcible attempts at entry. Flexibility and Design. The combination zone feature allows an installer to set the contact and shock conditions as independent alarm signals, or to flip a switch to combine them into one for larger systems with many points of protection. At 40% smaller than the previous model, the 5819S in white or brown blends easily with any décor. Easy to Install. Installation and set-up is simplified because of four basic sensitivity settings, an omni-directional shock sensor for maximum mounting flexibility, and LED feedback when adjusting the shock sensor.