# The Wireless Telegraphy Apparatus (Low Power Devices) (Exemption) Regulations 1991, Paragraph 6: Fixed Alarms


Wireless telegraphy apparatus designed or adapted–
(a) for the transmission of non-verbal signals to wireless telegraphy receiving apparatus installed in or upon a building in order to activate an alarm; and
(b) so as to be capable of use only–
(i) at a power not exceeding 10 mW ERP on the 173.225 MHz frequency; or
(ii) at a power not exceeding 100 mW ERP on the 458.8250 MHz frequency.

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Source: https://www.legislation.gov.uk/uksi/1991/1523/schedule/paragraph/6 (the official version)
Page: https://openlegislation.uk/wireless-telegraphy-apparatus-low-power-devices-exemption-regulations-1991/schedule/paragraph-6
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.