Encapsulated in locked, tamper-resistant GI, powder-coated enclosure. Enclosure can be painted in customised colours. Attempt to break open enclosure sounds an audio alarm and generates an event in the Central Control room. Provides full duplex conversation between user and control room operator. Control room operator can invoke conference mode and can include in conversation a third person/agency such as police and medical personnel. Easy to operate – is activated with a single button, and LED glows when in use. Control Room keeps a record of all the calls received.