- br br Top Deal Review - Garmin Rino 530HCx 2-Way Radio with GPS FRS GMRSbr br Technical Detailsbr High-Sensitivity, WAAS-Enabled GPS Receiverbr Electronic Compass Displays Accurate Heading While Standing Stillbr Barometric Sensor With Automatic Pressure Trend Recordingbr Features Built-In Quad Helix Receiving Antenna & Basemap With Automatic Routing Capabilitiesbr 5W Of Transmit Power Using Gmrs Frequency Up To 14-Mile Range