EN50131-4 Grade 2 and Grade 3 options Backlit option – ‘Dusk to dawn or ON’ backlit model only Comfort LEDs Lithium smart battery charging SAB/SCB option Confirmed alarm input – Audible and LED strobe – optional plus models Self test input plus models Fault relay output plus models Trigger polarity -/+ Tamper polarity -/+ plus models Trigger wire monitoring plus models Adjustable siren timer 3min / 15min / intermittent depending on model Adjustable siren volume Hi/Lo
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