Inferno Intenso is a sound barrier that can also be used as an alarm siren. Inferno Intenso is a unique sound barrier that generates an unbearable sound during alarms, which affects the entire body even when protective equipment is used. A single Inferno Intenso can cover an area of up to 150 cubic meters (approx. 70 sqm) indoors and several units can be connected together to cover significantly larger areas. For the best effect, it is recommended that two or more products are installed against each other in the area to be protected. The product can of course also be used as a traditional siren. Battery 9.6V 1600 mAh is included and should be replaced every three years or earlier when indicated by the product. Power consumption: 12-16 V DC, Standby time without charging: 30 days. Operating time at constant signal: > 30 minutes. Frequency: 2-5k Hz. Sound pressure: 125 -127 ±1 dB(A) @ 1m.