Kinetic Sound Bomb 2 Quad Piezo Internal Sounder has been a market leading internal sounder for domestic and industrial security alarm systems for over twenty years. Utilising Quad piezo elements our KSB2 is extremely loud combining high dB output with relatively low current consumption. Compatible with any Alarm Control Panel and used throughout the industry. Can be installed within any security alarm system complying with EN50131 up to Grade 3 & Environment class 2 provided it is not utilized as the principle warning device for notification purposes.