Siretta alpha adhesive mounting antennae siretta alpha74mfmefsmamss11 the siretta alpha 7 is a compact puck shaped gsm amp gps combination antenna it combines two separate antennas into a single package that measures only oslash50 x 175mm the alpha 7 is ideal for most gsm amp gps systems that require an all in one antenna solution combination antennas are perfect for applications where the use of multiple antennas is not an option for installation or space availability reas