The LD-324 alarm siren padlock combines mechanical security with active electronic deterrence in a compact zinc alloy housing. When the shackle is cut, bumped, or subjected to strong vibration, the built-in 110dB siren triggers an ear-piercing alarm that immediately draws attention and drives off would-be thieves. The hardened steel shackle resists bolt cutters and saws, while the zinc alloy body delivers solid impact resistance without excessive weight, making the lock practical for both indoor and outdoor applications.

A battery-powered electronic alarm module sits sealed inside the lock body and is armed automatically when the shackle is locked. The module draws minimal standby current, allowing standard button or AA batteries (depending on configuration) to deliver months of reliable operation before replacement. A rubberized keyway cover and sealed battery compartment protect the electronics from rain, dust, and temperature swings, ensuring consistent alarm performance in weather-exposed installations such as gates, sheds, and containers.

The lock is offered in body sizes of 60mm, 70mm, and 80mm with a 10mm hardened steel shackle and 25-35mm clearance, covering everything from light-duty lockers to heavy gates. Color options include Red and Silver, Black and Silver, and Red and Black, giving distributors visible, high-contrast finishes that stand out on retail pegboards. Each lock ships with two to three brass-cut keys and is available in keyed-different, keyed-alike, and master key configurations for fleet and property-management programs.

For wholesale buyers, the LD-324 supports full OEM customization including logo printing, custom alarm decals, tailored shackle dimensions, and branded packaging. With an MOQ of 200 pieces, mixed-order flexibility, and CE/RoHS/ISO 9001 compliance, it is a competitive addition to security hardware catalogs targeting hardware stores, e-commerce sellers, and property-management suppliers.