Advantages and disadvantages of access card for rental housing

The unit access card itself has no password. The working principle of the access card is to send RF signals to the access controller, and then the access controller receives the signals and processes them to control the unlocking of the electric lock. The general user card belongs to the unit, and there is a boarding record in the unit entrance guard. If you can't get in, you can ask the landlord for an access card, or ask the landlord to add an access card to the property. Residential property has the authority and methods to manage access control.