With legendary Master Lock toughness and convenient Bluetooth technology, you can unlock your lock, share access with guests, and monitor activity – all with one easy-to-use app. The smartphone app is called Master Lock Vault eLocks and is available for both iOS and Android. Whether you have your phone or not, you are always in control. As you can enjoy peace of mind by monitoring the lock’s activity, receive tamper alerts and low battery notifications. Even without the phone, you can open it by entering your directional code on the lock keypad. Security and control in the palm of your hand. Master Lock Bluetooth Smart Outdoor Padlocks made of high-quality metal construction with all-weather cover for superior weather protection.