JRC DGPS RECEIVER MODEL JLR-4341 (DISCONTINUED)Built-in SBAS (WAAS/EGNOS/MSAS)Built-in RAIM, satellites integrity check12-channels, 12-satellites trackingNMEA0183 (ver. 1.5/2.1/2.3) outputsOperates on 12-24V VDC Newer Post QUAD FREQUENCY ECHO SOUNDER MODEL JFC-180 Older Post DUAL FREQUENCY ECHO SOUNDER MODEL JFC-800/810