Secure Combination Lock & Compact Design: Heavy-duty ABS plastic construction (external size 3.7 x 2.4 x 1.3 inch) with foam-padded interior protects keys from scratches; Resettable 4-digit combination lock ensures only authorized access Super Strong Magnets & Anti-Drop Structure: Heavy-duty neodymium magnets provide 80lbs adhesion force to securely attach under car chassis; Reinforced anti-vibration structure prevents drop even on rough roads Waterproof & Dustproof Protection: Includes bag to block wireless signals and prevent unauthorized access to keyless entry systems Multi-Scenario Compatibility: Fits under most car models, RVs, or metal gates; Pre-drilled holes support wall mounting in garages, gardens, or workshops; Universal design stores spare keys, trackers, or emergency cash User-Friendly Installation & Reset: Step-by-step manual guides quick setup within five minutes; Default password 0000 with one-click reset function; 10000 password customizable combinations that it is not cracked Color: Black Material: ABS Plastic Package Contents: 1 pcs * magnetic key box for under car Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.