Klaxon Signals XMB240 P-series master blaster is a powerful motor driven siren producing a very high sound output, designed for use as an internal or external security alarm. The siren is powered by a 230V AC supply and contains an integral activation relay. It is supplied with either a 12V DC relay for security applications or 24V DC relay for fire. Designed for surface mounting, the Master Blaster has a separate mounting bracket which may be secured into position first for easy installation. In addition, it comes pre-wired with 1m of cable. It has a weatherproof construction when wall mounted and is suitable for continuous use. The Master Blaster is ideal for security and fire applications where a higher sound output is required.