Solid Construction & Heavy Duty - The Key Lock Box for Outside Wall Mount is made of strong, heavy duty Aluminum alloy material, which is waterproof, non-corrosive and weather-resistant. The home key storage box protects your stuff from dust, rust, sunlight, rain and snow, perfect for outdoor wall mounted. 4-Digit Combination & Emergency Key - The secure box keys holder offers a 4-digit code with total of 10,000 combinations for optimal protection, reset it when you receive the key box (original code "0-0-0-0"). Set your own access code and change it regularly to improve security. NOTE: Please use the emergency key to open box if you forget password. Easy to Install & Weatherproof - Mounting hardwares: 4 screws and 4 nylon expansion dowels, ensure the portable lock box for house key can be mounted on any solid surface of companies, classrooms, holiday homes, apartment entrances and homes etc. Large Storage & Security - The lock box for keys with code has a large storage space (Interior Dimensions approx.: 4.5 * 3.7 * 2 inch), which is ideal for house keys, office keys or car keys, sapre keys, access cards or small stuff etc. The large outdoor key safe helps you save time and protect keys without the risk of loss or theft. Wide Application - The key storage security lockbox is suitable for indoor and outdoor use, can be widely used in home, garden, office etc. Instead of placing them under a carpet, flower pot or rock, it is more safe to lock them in the key box, more convenient for family members, tenants, cleaner, workmen. Please contact with us if you have any question, 24 hours friendly customer service be provided.