Lock Features: .110db alarm .Auto-alarming system &Push down locking system .Can be used alarmed or unalarmed .Removable Alarm Module .Dual Shock & Movement Sensor .Corrosion Resistant .Ice Spray Proof & resistant against salt and hard weather .Anti twist shackle .Anti Drill .Anti bumper prevents scratching .Key arming .Hardened Stainless steel shackle .Hardened stainless steel body