The HQ monitors for tampering with the sensors as well as battery levels. The HQ can be connected to a siren or to any existing alarm panel and can be armed/disarmed by remote control. The Roboguard sensor is weather proof, tamper proof, robust and impervious to lightning and ultra violet damage. The Roboguard sensor can be positioned up to 4oo metres from the (HQ) (and up to 800 metres with a booster). The Roboguard will detect movement up to 20 metres away and has a detection arc of 110 degrees.