... phone and telephone. This alarm system is widely used for security protecting, data surveying and remote monitoring in shops, villas ... and departments of electricity, petroleum, coal, government, public security and other unattended positions.1. 4 wired and 12 ... 2VSiren Volume: 110dBStandard pack components1 main panel, 1 wireless infrared (motion) detector, 1 wireless door magnetic detector,1 siren ...