All electronic equipment sold in Europe must clearly be marked with the “CE” sign. The electronic device this mark indicates that it passes all European laws that apply to that type of equipment. For repeaters, the “Radio Equipment Directive” (R.E.D) applies regulations.
From 13 June 2017, the new RED rules (Radio Equipment Directive 2014/53/EU) are applicable. The Radio Equipment Directive 2014/53/EU establishes essential radio equipment requirements for safety and health, electromagnetic compatibility, and the efficient use of radio spectrum. HiBoost products comply with the latest RED rules.
Here you can find CE RED and Declaration of Conformity documents for HiBoost mobile phone signal boosters. You can download this file if you need to prove the authenticity of these products to the authority.