The SAS-2155 is a thin piezo electric siren with high sound pressure, low weight and low current consumption. The sound output is a powerful, clear and aggressive warning signal. There are many applications for this siren : all fire alarms, cars and motor vehicles, automation equipment, security devices, etc. The vibrating elements are unique and developed at Sonitron (worldwide patented). This series made of high quality materials, offers extreme reliability and robustness, and features a life time over 2.000 hours in continuous use.