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I purchased this accessory for My Garmin 376C to use in a RV to drive from California to Minnesota. It also works great on flights to keep track of your location. The RV has a sleeping section over the cab and thus the sky is not visible from the dash. I mounted the remote antenna using the suction cup mount in the upper window over the cab and it worked great for the nearly 2000 mile trip. I ordered it on a Thursday from Amazon and received it on Friday morning for a Saturday morning flight to California. Highly recommended.
After talking to a few folks they recommended this item. My 2004 Buick Rendezvous has OnStar, Satellite Radio (XM), and a coated windshield. These factors prevented my new Garmin StreetPilot III from getting satellite reception. As soon as I plugged it in using the roof mount I received great satellite reception- consistent and reliable reception. I have not lost a signal since.
The external antenna is essential for vehicle use. It allows the GPS to acquire more satellites faster and boosts the accuracy and reception in a huge way. It comes with a magnetic mounting, a suction cup mounting, and a screw-on mounting. It's a must have for any serious GPS user.
I had my Garmin III GPS (talking street pilot) mounted on the dash of my Expedition and with its attached antenna I rarely could get (and then frequently would drop) enough satellites to give a good fix. After installing the external unit (10 minutes, no drilling)., I always had a good signal and never dropped it. Without this, the GPS is less than reliable inside your vehicle.
What a great plus for anyone who uses their GPS for their car. When it usually takes up to a minute to sufficiently aquire satellites, the antenna allowed me to aquire over six satellites within 15 seconds. By the way, if you choose to mount it on the outside of the vehicle, it simply involves screwing the antenna to a magnet which magnetically sticks to the car. As I opened the box, I was surprised how small and compact it really is (about the size of a cell phone). Also, it has enough cable to run wherever needed. I chose to use the suction cup method which took literally 30 seconds to assemble. I bought this antenna for my StreetPilot III. I also suctioned it on to the side window with the same success.
It simply entailed taking off the antenna on the StreetPilot III and replacing it with the antenna and then screwing the antenna to the suction cup mount. Then I took the suction cup and mounted it first on my windshield. There is no screwing into the car itself. This is a great product.
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