TechniSat DIGITRADIO BT 1 Operating Instructions Manual page 11

General:
Indoor use - Appliances with this symbol are only suitable for indoor use.
Protection class II - Electrical appliances in protection class II are electrical
appliances that have continuous double and/or reinforced insulation and no
connection options for a protective conductor. The housing of an insulated
electrical appliance of protection class II can partially or completely form the
additional or reinforced insulation.
Your appliance bears the CE mark and fulfils all required EU standards.
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