FAQ We provide antenna manufacturers and offer a big range of internal patch antennawhich includes GPS patch antenna, ceramic patch antenna and patch antenna design.Q:What is the difference between internal and external GPS antenna?A:The internal antenna is built into the device. The external antenna can be mounted in a remote location.The only reason to use an external antenna instead of an internal antenna isif the device being used will be mounted in a location where it cannot acquire the GPS signal.Q:The picture is real product?A:Yes,all product pictures are real product.Q:If stock quantity is not enough from link, how to do?A: Contact/Leave message to us, we will reply and help check exact stock within 12 hours. If go to bulk ordering, usually lead time 10-15 days.Q:when I go to bulk several items, and find shipping cost is different, how do I do?A: Shipping cost depends on unit weight, but if you find shipping cost very high,Contact/Leave message to us, we will check whether shipping cost can be reduced.Q:How can I get commercial invoice for company finance?A: Contact/Leave message to us,leave billing address, we will send PDF version there.Q:Is the antenna has different length cable or connectors?A:Yes, can be custom-made, Contact/Leave message to us, we can quote for you.Q:Is GLONASS better than GPS?A:The 2 systems also differ somewhat on accuracy. GLONASS position accuracy is 5-10m while GPS is 3.5-7.8m.Therefore, GPS outweighs GLONASS in accuracy as lower error numbers are better.Q:Should you use GPS with GLONASS?A:Actually only gps should do its job in case satellite reception is perfect.The combination with another system will improve accuracy when the signal gets weaker.Q:Does GPS work without an antenna?A:GPS (Global Positioning System) systems work by receiving signals from satellites.That isn't possible without an antennaQ:Where to put a GPS antenna?A:In most cases, you can mount the GPS antenna near the top of the underside of your dash (behind or above the receiver). DIMENSIONS & SPECIFICATIONS & Radiation Pattern