The marking's purpose is to inform the equipment user that the equipment are collected separately from other waste. The obligatory markings indicating separate collection apply all EEE put on the market after 13 August 2005.
The electrical & electronic equipment put on the market after 13 August 2005 has to be marked with an indication of the producer who put the equipment on the market in the European Community.
The symbol must be marked on the equipment visibly, legibly and indelibly.
In special cases, if necessary due to the size or operation of the product, the symbol can be marked on the package, instructions of use, or warranty certificate of the electrical/electronic equipment. (Government Decree on Waste Electrical and Electronic Equipment, 11 § Markings on Electrical and Electronic Equipment)
Read more about markings from Tukes' website.