Kinetic Sound Bomb 1 Twin Piezo Internal Sounder has been the industry standard ancillary internal sounder for domestic and industrial security alarm systems throughout the past twenty years. Utilising twin piezo sound chambers sound bomb-1 is extremely loud, combining high dB output with relatively low current consumption. It is compatible with any alarm control panel and used throughout the industry. It can be installed within any security alarm system complying with EN50131 up to grade-3 and environment class-2 provided it is not utilized as the principle warning device for notification purposes.