Access control enables you to control who has access to your building. Locks and keys also allow you to secure your building, but when keys are lost or stolen, the inconvenience and expense of changing locks and re-issuing keys can be considerable. Keys may also be copied, creating even more security risks. All businesses, whether small, medium or large, have assets that need to be protected from theft. There is also the issue of protecting staff and their property. It is common in buildings that are secured by locks and keys for doors to be left unlocked all day. This opens up the possibility of opportunist theft and malicious damage. Electronic access control provides the most efficient and convenient way of securing your building and assets. Installing an access control system means that you will never have to change a lock again. Tokens are issued to allow access through the controlled doors, and are easily barred from the system if they are lost, stolen or just not returned by someone who leaves your company. Barred tokens will not allow access through the controlled doors. Once an access control system is installed, all doors controlled by the system will automatically lock when the door is closed. Anyone without a PIN or access token is unable to enter. If necessary, doors may be set to unlock during a designated time frame. Access control can also offer flexible control over users? access rights. For example, all staff can gain access through the main door of a building, but access to internal areas may be restricted to those who have a specific need to be there. Access may also be restricted by time, only granting access to particular users at certain times of day or night.