The LD-380 smart alarm padlock combines robust mechanical security with active electronic deterrence in a compact zinc alloy housing branded with SHOCK SENSOR and SMART LOCK identification. At the core of this padlock is a highly sensitive shock sensor module that detects impacts, vibrations, and cutting attempts, instantly triggering a piercing 105-120dB siren alarm that startles thieves and draws immediate attention to the secured area. The hardened steel shackle resists bolt cutters, hacksaws, and prying tools, while the zinc alloy die-cast body provides excellent impact resistance and corrosion protection for both indoor and outdoor applications. Available in five eye-catching colors - Silver, Yellow, Red, Black, and Blue - these padlocks stand out on retail shelves and offer buyers a range of visual options.

Powered by a readily available CR2032 button battery, the alarm module features an ultra-low standby current design that delivers 6 to 12 months of reliable operation on a single battery, depending on frequency of alarm activations. The shock sensor sensitivity is adjustable, allowing users to set the trigger threshold according to their specific environment - from high sensitivity in quiet storage areas to lower sensitivity in industrial or high-traffic locations where false alarms from ambient vibration would be problematic. The lock is armed automatically when the shackle is closed and locked, and disarms when the correct key is inserted and turned. A sealed battery compartment and rubberized keyway cover protect the electronic components from dust, moisture, and moderate rain exposure, ensuring dependable performance in a variety of conditions.

The padlock body ranges from 50mm to 65mm in width with a hardened steel shackle of 6-8mm diameter and 20-30mm shackle height, offering flexibility to suit different locking scenarios from lockers and toolboxes to gates and storage containers. Each padlock comes with two brass keys that operate the precision brass cylinder, providing smooth key insertion and long-term wear resistance. The retail-ready blister pack or color box packaging clearly displays the SHOCK SENSOR and SMART LOCK branding, making it easy for hardware stores, bicycle shops, and security product retailers to merchandise the product effectively and communicate its key benefits to customers at a glance.

For wholesale buyers and distributors, the LD-380 offers compelling commercial advantages including an MOQ of 200 pieces, mixed order support across all five colors and multiple size configurations, and comprehensive OEM customization options such as logo engraving, custom decals, branded packaging, and tailored sensitivity settings. Certified to CE, ISO 9001, and RoHS standards, the product meets international quality, safety, and environmental compliance requirements. With a production lead time of 15-25 days and samples available for evaluation, this smart alarm padlock is an excellent addition to security hardware catalogs targeting bicycle retailers, hardware chains, e-commerce sellers, industrial supply distributors, and security product importers worldwide.