PERFORMANCE PARAMETER: -------------------------------------------------------------------------------- Sound Rating: 134?dB(C) @1M Electric Motor: 7.5Kw, 380/400/440V AC, 50/60Hz IP Rating: IP44 Output Frequency: 500/560?0Hz D Tone Net Weight: 156Kg Carton Size: 150x150x135CMCM DESCRIPTION: -------------------------------------------------------------------------------- LK-STH21-2 is an omnidirectional dual-tone siren for vertical mounting. The casing and horns are made of stainless steel, which will give a long service life when mounted outdoors. Powered by a three phase motor. It is designed for roof or pole mounting. It can be used in: Civil defence warning ststems of major cities all over the world. Fire warning systems of community, main factories, mines, buildings, froests, wharf, etc. Warning for natural disasters of earthquake, tsunami, flood, etc. Warning for accidents of reservoirs, dams, jails, airports, army, etc. Please specify the voltage when placing orders with us.