Master Lock Bluetooth Smart Padlocks puts control in the palm of your hand, so you can protect what matters the most in life. Unlock your lock, share access with guests, and monitor activity - all with one easy-to-use app. Never lose your keys or forget your combination again! With this Bluetooth Smart padlock, your phone is your key. Whether you have your phone or not, you're always in control. To open the lock with your phone, touch any button on the lock and open it. Don't have your phone or battery dead? Just enter the directional code on your lock keypad. Give people access to your lock without the risk of giving out keys or combination. Simply give them all day access or limit access to day or night. Tamper alerts give you peace of mind while on vacation, so you can focus on what's really important: creating memories with your family. Easily manage your workforce's access to key areas and keep an effortless log of employee entry that you can bring up anytime, anywhere.