... 3.Super-thin,soft light 4. Maximum size:90cmX60cm el advertisement backlightWHAT IS EL?EL Operating Theory:EL is an equipment that ... note book, electronic dictionary, control panel of music equipment, micro-wave stove, control panel of fax machine, printer, watch...... ... chest mark.8. Business Eequipment, Machine In Public: Station poster for omnibus, public telephone box , automatic soft drink , ...