Technical parameter frequency: 8.2MHz(decode, decode limited, clarity, paper of label) Size: 30mm?0mm Number:FT-304(3?) Color: bar code, white, black or as required Description: thin paper of label which adapt to all wireless radio frequency system of 8.2MHz. It fits to all the goods in retail store. Phsyic criterion: the label is controled by electron goods. Antenna size(MD譚D):30?0mm Bandwidth(TD): 32mm Bandwidth(TD): 42mm The empty part of the bottom 20um Induction District: 70um Aluminum-capacitance area: 20um