The AD-200 is a simple, economical solution if no access control system currently exists in facility, or for openings that don?t require the control of a networked solution. Since user rights are stored on the lock, the AD-200 solution is ideal for small to medium size applications. The Handheld Device (HHD) used in conjunction with your access control software, allows you to easily add or delete users and retrieve audits. Lock and unlock schedules, as well as time zones and holidays can be programmed for added security and convenience. The AD-200 is easily upgradable to a networked lock if requirements change in the future.