Be a smart landlord.

No matter how many tenants, or they are long-term/temporary stay, you can easily manage their access and no more keys lost.

Your cleaning lady forgot entrance code or her finger wrapped by Band-Aid?

Using your smartphone to remotely unlock the door for her, let her do what she should do on schedule.

Your friend visits you without prior notice? Your kids get back home earlier than you?

Using your smartphone to remotely unlock the door for him, let him make himself at home and wait you back. It will be real-time monitoring when your children arrived home.

Keep kids away from weapon/dangerous facilities storage or protect your valuables.

Your fingerprint and the code you set up will be unique for the lock of such storage place. Nobody can access but you!