Me FR-81.2 is a wireless doorbell/paging system. It is ideal for use in noisy environments and for the hearing impaired due to its additional, switchable vibration alarm. The transmitter and receiver can be operated independently of the mains supply, offering a variety of possible applications. The devices can be set to different system codings to avoid overlapping with the same or similar radio systems in the neighborhood. The radio range is up to approx. 100 meters in open terrain with visual contact.