Havey duty locks 1.110db siren,alarm underwater 2.Alarm speaker in ... bottom of padlock body 3.Sturdy,safe,CE&RoHS passed Heavy duty locks, alarm padlock, alarm lock, container alarm padlock, security lock ... .Corrosion Resistant .Weather resistant.Ice Spray Proof & resistant against salt and hard weather .Antimuffle design .Anti Drill .Anti bumper prevents scratching ...