Havey duty locks 1.110db siren,alarm underwater 2.Alarm ... bottom of padlock body 3.Sturdy,safe,CE&RoHS passed Heavy duty locks, alarm padlock, alarm lock, container alarm padlock, ... resistant against salt and hard weather .Antimuffle design .Anti Drill .Anti bumper prevents scratching .Removable Alarm Module4.Lock shackle:. ... garden shed etc. Can protect you from unnecessary lost. Heavy duty locks