1,Scare the birds away a larger radius; 2,Have a longer life(10years); 3,AC-power 220V; 4,Play a role in the scope of:>2600M2 Technical ParametersPower220V ACUltrasonic sound pressure120dBTemperature-40~60°c Play a role in the scope of:>2000 M2Application1,It can be used to drives away all kinds of birds such as,Pigeons,Crows,Sparrows,Starling,Seagulls,Grackles,Cormorants,Vultures,Rodents,Other ...