No more lost keys or forgotten combinations—these padlocks open with your Bluetooth-enabled smartphone. Download the lock’s corresponding app to register the lock and control it. Through the app, you can add or remove users, set a schedule for when they have access, and track activity. You can also give short-term access to temporary users, such as contractors or inspectors. All padlocks are battery operated and alert you when the battery is low. If the battery dies, these padlocks remain locked until the power is restored.