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AR-PB-321/323CPI:Suitable for rental housing or hotel room that requires room services features for its guests. Guests can select DND (Do Not Disturb) to say no to room cleaning or MUR (Make Up Room) to let room services know guest want the room to be cleaned.
CPO:Following AR-888-CPI functions, AR-888-CPO will display option selected by room guests either to clean the room or not. Equipped with another button, Doorbell function is replacing door knocking when room services have delivery for guests.