Built-in parallel 12 channel GPS receiver. DSC Distress call, Urgency, Safety, Postion Report and Reply and Individual calling. 6 Watt Transmit power. Volume & Squelch indication on display. NMEA output of DSC, DSE, GLL, RMC, GSA, GSV and GGA Channel names on display. NOAA Weather Channels. SOS Strobe light. 1150 mAh Rechargeable Li-Ion battery. 110 VAC and 12 VDC Chargers included. Position information shown on the display. Keylock Case dimensions: 2.44" W x 5.57" H x 1.61" D.