The alarm padlock has a sturdy locking mechanism, made of hardened steel and designed to securely fasten the shackle to prevent unauthorized access. Weather Resistance Alarm padlocks are designed to be weather-resistant. The inner body is brass and the outer body is plastic and hardened Iron Shackle Alarm System The alarm is triggered by various actions, such as vibrations, movement, or attempts to tamper with the lock. Power Source Alarm padlocks are battery-powered. The power source are replaceable batteries, One set of extra batteries is provided with the pack.Weather-Resistant Alarm Security Lock, Your Ultimate Guardian Defy the elements with our exceptional Alarm Security Lock, meticulously crafted to safeguard your possessions with unwavering fortitude. Rain or shine, it remains your stalwart protector, combining superior weather resistance with an impenetrable lock system. Easy to Use: With 2 Modes Option Activate the Alarm: Activate the lock's alarm feature by pressing the as per the above Manual. A reassuring beep indicator will confirm the activation, assuring you that the alarm system is armed and ready. Amplify Your Security with the Deafening 110 dB Siren of our Alarm Security Lock Our Alarm Security Lock boasts an ear-shattering 110 dB siren, piercing through the silence and catching the attention of anyone nearby. This formidable sound level ensures that any unauthorized attempt to tamper with the lock will be met with an unmistakable, attention-grabbing alarm.