Sonic Shock 4 Video and Computer Anti-theft Alarm Heavy duty stainless steel contsruction, keyed trigger, no false alarms, 10' tether included. Installs in minutes with included 2 part epoxy, alarm with included Key Works on Plasma Screens, LCD Panels, Video Projectors or other expensive elactrioncs. Battery monitors for years, 120db alarm rings for hours when tripped. Just wrap the tether cable around a fixed object, and set the trigger.