Summer Offers: Install motion, door opening, and glass break alarms. Alarm Options: - Alarm for door opening with the ability to program it for working hours. - Glass break alarm. - Motion alarm with the ability to program it for working hours. - External and internal alarm sirens. (Can be installed separately or as a group, but a central unit is required for these devices). Can be linked to send notifications to your mobile and controlled via the Hik connect app. Can be linked to more than one user on multiple phones.