Siretta mike series magnetic antennas siretta mike1a25msmamss12 the siretta mike 1a is a frac14 wave magnetic mounting whip antenna tuned to quad band gsm gprs and 3g frequencies its strong magnetic base provides a versatile method of mounting allowing the user to repeatedly manoeuvre the antenna to best optimise signal strength magnetic mounting antennas are ideal for quick and easy installations that can be adjusted at a later datecommon applications for this magnetic mountin