About: http://webisa.webdatacommons.org/15549791

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	This siren produced an incredible 138 dB at 100 feet, and the frequency was 460 Hz at 4.600 RPM. It could be remotely controlled from inside a building or other location.
http://www.w3.org/ns/prov#wasQuotedFrom	antiqueweekend.com