DS EN 302291-2:2005 Electromagnetic Compatibility And Radio Spectrum Matters (Erm) - Short Range Devices (Srd) - Close Range Inductive Data Communication Equipment Operating At 13,56 Mhz - Part 2: Harmonized En Under Article 3.2 Of The R&Tte Directive Describes the minimum characteristics considered necessary in order to make the best use of the available frequencies.