Manufacturing GPS, tri- and quad-band antennas for major telecom OEMs worldwide, we at Allis Communications emphasize quality in all of the products we deliver. We start by using the finest components during production, such as chips from Philips and UL-approved cables from Tatung (Taiwan). We also rigorously test each antenna using network analyzers from HP, spectrum analyzers, and an RF chamber. So you know antennas from Allis Communications will meet your quality requirements.