... your home and propertities. Alarm siren locks for security use:Lock Specifications:1.Alarm sound:.110dB siren2.Alarm ... .Lock body:.Dimensions:9.8(H) x 7.1 (W) x 3.35 (D)cm,.Hardened Aluminum ... alarm lock:Anti muffle design, people can't use their hands or fingers to muffle the alarm ... sounds louder, the rain can't come inside, Widely use, for motorcycles, bicycles, containers, trucks, garden shed etc. ...