Comet CA-2X4SRNMO Dual Band Mobile Antenna 144/440 MHz – High Gain VHF UHF NMO Mount Antenna for Ham Radio, GMRS, and Vehicle Use – Compatible with Icom, Yaesu, Kenwood, and Other Mobile Radios

This is a really good mobile antenna suitable for HAM as well as GMRS/FRS communications. It has a pretty widebanded operation and has held up well over the years. I own 5 of these antennas and they are my favorite, go to mobile antenna. I have only every used this antenna with a mag mount and it works just fine. Good purchase!

I bought this antenna primarily to use on my boat where I wanted to shared an antenna feed with both a GMRS radio, and a Marine VHF radio using a frequency-split diplexer. In that application it works great. Signal strength is very good, SWR at those frequencies is very good (<1.3:1) and installation was exactly how I expected. But then I discovered that this is also just a great all around antenna for 2m, 70cm, MURS, GMRS, Marine VHF, and in scanning (receive only) applications from 25MHz to 1.3GHz. I have one hooked up to my RTL-SDR, for example, so I can scan any service within its bandwidth range. The fold-down is rather stiff. I don't use this in offroad conditions currently, so I don't need a spring. But a spring kit is available if you need it to be better protected offroad. It's a rather long antenna due to its compatibility with 2m VHF. But it's a good all around antenna, very effective at the ranges I've tested. Recently I used it to hit a GMRS repeater 64 miles away with a 4w handheld.

This is my GO TO antenna for 2 and 70cm AND GMRS. This one makes three

Works good, swr around less than 1.0 . Tall enough to go over the cab for a good signal . Spendy when you add the spring whip but I think you need it.

It works great, made a huge difference in RX and TX. I have both Amature radio and GMRS radios, improved both. I also have it fitted to a Btech Nagoya GPK-01 (21" Radials) NMO Mount Ground Plane Kit. I am easily hitting repeaters 200 miles away with it mounted on a 30 ft pole, I am 6000 ft ASL.

I purchased this antenna for my mobile rig. I’m have less than 1.5 SWR across VHF, UHF, and GMRS. In my local area, I regularly hit repeaters 25-30 miles away off of my Yaesu FTM-510DR. The 2x4SR stands up to highway+ speeds extremely well. This antenna works so well, I even purchased one for my father. Overall, I am extremely happy I purchased this antenna. If anything were to happen to mine, I would buy a replacement without question.

Fantastic antenna. GMRS, 2M, 1.25M, 70CM all work great. Tons of range, easy to use good build quality. My new go to for these portions of the bands.

...it came without a parts list specs--Comet's website doesn't function well so it's not downloadable from there. I would've upped my rating if the spec sheet came with the antenna.