HQRP® External Antenna Help boost the GPS signal of your GPS device when it is difficult to get a clear line of sight with the GPS satellites in the sky. This small external active antenna acts as an extension of your existing GPS receiver and can be mounted on the dashboard in your car or anywhere else up to 96.5 away. Compatible with: Synergy Systems AR-10K / AR-10S / ART-10K / SynPaQ/E-M12+T / SynPaQ/E-SS12 / SynPaQ/IE-M12+ / DB-9 GPS Sensors / DB9GPS Sensors / Furuno Receiver AU-12-5B / Garmin AIS 600 / GDU 250 / 250XL / 300XL TSO / 373 / 375 / 420 GNC 250 / 250XL / 300XL TSO / 420 NS 430 / 530 / 15 / 15H / 15L / 15x / 15xH / 15xL / 25 SERIES / 100AVD 150 / 150XL / 155/165 TSO / 155 XL TSO / 165 TSO / 400 / 500 / GPSMAP 172 / 178 / 178C / 192C / 198C / 278 / 292 / 298C / 378 / 420 / 420s / 430 / 430s / 440 / 440s / 478 / 492 / 495 / 496 / 498C Sounder / 520 / 520S / 525 / 525S / 535 / 535S / 540 / 540S / 740 / 740S / MAP 205 / iCOM High Resolution Graphic Receiver GP-270ML / GP-360ML / Raven Industries Invicta GPS Receiver (110) Low Profile GPS Antenna (RPA) / San Jose Navigation AIS Transceiver AIS-2 Disclaimer: This is not an Original Equipment Manufacturer (OEM) product HQRP branded product is a replacement. All brand names and logos are registered trademarks of their respective owners. Any use of the brand names or model designations for this product are made solely for purposes of demonstrating compatibility.