Our heavy duty magnet base with RP-SMA connector features 11 feet of high grade CFD-200 low loss extension cable built into the base. This means you can extend your RP-SMA antenna with very limited loss. This is a great option for short range extension of one of these three popular Helium hotspots: RAK 2, Nebra Indoor, or SenseCAP M1 miner factory antenna. It will work with other RP-SMA antennas too. It does not work with the Bobcat factory antenna though as that antenna has a different connector type. Simply connect the factory antenna to the RP-SMA connector on the base, and the RP-SMA connector on the cable will connect to your miner. The base is magnetic so do not put the base right near a computer hard drive. Or use with another 915 Mhz antenna with RP-SMA connector designed for Helium. Cheap entry level magnet docking bases for antennas typically have cables without shielding, giving you as much as 6 dBi of gain loss over the same length cable. Our thick shielded CFD-200 cable limits gain loss to just 1 dBi for 915 MHz, helping you preserve your antenna gain. This is great to pair with RP-SMA type WiFi antennas also such ALFA ARS-N19 or ALFA APA-M25. For purposes of clarification, the 9 dBi antenna shown in one product photo is not included in this sale and is shown only for demo size comparison purposes. Heavy Duty/Heavy Weight When you need your magnet base to stay upright in higher winds, lower cost light weight alternatives can't form a strong bond to the magnetic surface and are likely to fall over. Some bases may tip just due to the weight of your antenna. Our heavy duty magnet gives the total base a weight of 11 ounces, compared to just 3 ounces for an entry level base. Compatibility: This base has an RP-SMA female connector on the top, and an RP-SMA male connector at the end of the 11 foot cable. RP-SMA is reverse polarity SMA, so the female port has a pin and the male has a hole, as the gender with RP goes by threading. This base is compatible with many popular RP-SMA antennas, including all of the RP-SMA antennas we sell from Alfa Network, Inc. in our eBay store..