<p>The Master Lock 5441EC Bluetooth Wall Mount Lock Box combines strength and technology to provide ultimate security for homes and businesses. With military grade encryption and high-security features, this lock withstands physical attacks and hacks, ensuring your property stays protected. Use the Master Lock Vault System and our easy-to-use app for convenient and controlled access.</p> <p><strong>Master Lock 5441EC Bluetooth Portable Lock Box Features:<br></strong></p> <ul> <li>Use your smartphone to open your lock with the Master Lock Vault app</li> <li>Never worry about a forgotten combination!</li> <li>Share access with others - temporary or permanent</li> <li>Share 24/7 access or limit to days or nights</li> <li>Monitor access history &amp; receive tamper alerts</li> <li>Backup access using directional code on the lock keypad</li> <li>Low battery notification &amp; reminder on padlock and in-app</li> <li>Comes with easy to replace CR123A battery</li> <li class="featured-text mt-1">Includes mounting hardware for easy installation.</li> <li class="featured-text mt-1"> <span style="font-size: 0.875rem;">Large storage capacity for keys and access cards</span><br> </li> <li> <div class="col-12 col-md-6 col-lg-5 offset-lg-1 pb-lg-5">Exterior Dimensions: 5" x 3-1/4" x 2-5/16"<br> </div> </li> </ul>