Quick view Compare Add to Cart The item has been added Senva Senva SS-A : Siren/Strobe Alert System (AMBER) connects to gas sensors for centralized CO2/toxic gas warnings. 105dB siren & bright strobe (8 patterns) alert occupants. Tamper-proof, 32 tones, 2 volumes. MSRP: Was: Now: (Inc. Sales Tax) MSRP: $195.00 Was: Now: $80.43