Double Agent\nWhen connected to a chuango alarm system controller and an incident occurs, the WS-105 siren will go off with the strobe light flashing. For smaller premises, the unit can work as an on-site controller with other accessories, such as remote controls, door/window contact sensors and PIR detectors, on the same radio frequency. Two for one, not a bad deal.\n\nSystem Highlights\nElegant & Refreshing\nThe piano finish and streamlined design make the WS-105 an art of its own.\n\nNight Beacon\nThe WS-105 beacons a sense of serenity and security (in a non-intrusive blue hue), when functioning as an idle system controller. When connected to another system controller as a siren, it stays unobtrusive and behind the scene if not triggered.\n\nPlug & Play\nPlug theWS-105 into an AC power socket, and it works. No wires, no fuss.\n\nIn the box\n- WS-105 On-Site Alarm Panel ×1\n- PIR-910 Wireless PIR Motion Detector ×1\n- DWC-102 Wireless Door/Window Contact ×1\n- RC-80 Wireless Remote Control ×2