Siretta mike series magnetic antennas siretta mike2a5mll1smamss26 the mike 2a from siretta is a frac12 wave high gain magnetic mounting whip antenna tuned to quad band gsm gprs and 3g umts frequencies with a high peak gain of 5dbi the mike 2a is a great antenna for demanding applications that require strong signal transmission and reception capability its magnetic base provides a versatile method of mounting allowing the user to manoeuvre the antenna to best optimise signal