SM SERIES SM30 Type: Motor Siren (Max. 110dB at 1m) Voltage: DC:12V,24V AC:110V,220V Dimension (mm): Diameter: Ø77 Length: 82 Materials: Housing-Steel Protection rating: IP44 SM40 Type: Motor Siren (Max. 116dB at 1m) Voltage: DC:12V,24V AC:110V,220V Dimension (mm): Diameter: Ø128 Length: 162 Materials: Housing-ABS Protection rating: IP44 SM200 Type: Motor Siren (Max. 120dB at 1m) Voltage: DC:12V,24V AC:110V,220V Dimension (mm): Diameter: Ø143 Length: 231 Materials: Housing-Steel Protection rating: IP44 SM400 Type: Motor Siren (Max. 123dB at 1m) Voltage: DC:12V,24V AC:110V,220V Dimension (mm): Diameter: Ø165 Length: 284 Materials: Housing-Steel Protection rating: IP44