Master Lock.Open and manage with your smartphone or with temporary or permanent codes. Monitor who visits and when through the App and notifications. Removable shackle can be managed with the App or a traditional code. Large capacity to hold key cards or traditional keys. Long life battery is easily replaceable. Solid body durability and coated surface to protect hardware and door finish. Works with the free Master Lock Vault eLocks App. Open and manage with your smartphone Use the FREE Master Lock Vault eLocks App for Android or IOS. Can also be accessed by entering a traditional code on the keypad Schedule access now or in the future Provide permanent or temporary access Removable shackle for easy portability and installation. Use the App or web to track usage.