Fully Integrated Sounder/Strobe Self Activating Cut Off Timer, Aesthetic Enclosure, Dual Anti-Tamper Operation, NiCad Battery Back Up & Twin Led Status Indication En50131-1 Security Grade 2 , Environmental Class Iv
*White / Blue Bell box has 115dB Sounder output
*Fully integrated sounder / Strobe
*Self-activating cut-off timer
*Aesthetic enclosure
*Dual anti-tamper operation
*NiCad battery backup & twin LED Status indication