Display 3.8-inch, LED backlit, 320 by 240 pixels Communication speed 57.6 kbps Microphone input -54 dBm Rated audio output speaker (8Ω): ≤5W, handset (150Ω): 1 mW or more Frequency transmit 1605.0 to 27500.0 kHz (100 Hz steps) Frequency receive 90.0 to 29999.9 kHz (100 Hz steps) Emission type J3E, F1B, A1A, H3E, H2B, J2D Channels up to 400 (20 ch x 20 groups) ITU preset channels 1722 ch Channel switching time ≤15 sec Communication method push-to-talk (simplex, semi-duplex) Antenna impedance 50Ω Interface IEC61162-1 (GPS, RMS), NMEA0183 NMEA version 1.5, 2.0, 2.3 NMEA input GGA, GLL, RMC, GNS, ZDA Power supply 21.6 to 31.2V DC Power consumption 150W transmit: ≤30A, receive: ≤5A Operating temperature −15 to 55°C (parts exposed to condensation −25 to 55°C) Storage temperature −15 to 55°C (parts exposed to condensation −25 to 70°C) Operating humidity 0% to 93% non-condensing Protection rate IP22 (controller)