The scope of the Technical Report is to identify technical characteristics of particular RFID air interface protocols that need to be taken into consideration by operators of RFID systems in undertaking their privacy impact assessment. It also provides information for those operators who provide RFID-tagged items that are likely to be read by customers or other organisations. This Technical Report provides detailed privacy and security characteristics that apply to products that are compliant with specific air interface protocols, and also to variant models that comply with such standards. The Technical Report also identifies proprietary privacy and security features which have been added to tags, which are problematic of being implemented in open systems which depend on interoperability between different devices. Such proprietary solutions, whilst being technically sound, in fact impede interoperability. The gap analysis thus identified can be used to encourage greater standardization.