• Auto alarming and locking system with a 110db loud alarm siren. • Hardened zinc alloy body for durability and resistance to corrosion. • Dual shock and movement sensor to trigger the alarm. • Tamper-proof batteries for reliable operation. • Hot processed hardened steel shackle with a 10mm diameter for cut resistance. • Anti-twist and anti-cut shackle design. • Includes 3 high-security cut keys that cannot be easily copied.