... -step backlighting.3.Built-in DSC (RTCM SC-101)For distress calls, or for position request/ position report.4.Force5Audio speakerDelivers impressive ... are suitable to famous Two-Way Radios, such as MOTOROLA, ICOM, KENWOOD, Yaesu,Vertex standard and so on.2.Pls make ... .I hope we can achieve long-term cooperation. Marine Mobile Radio IC-M304 VHF walkie talkie amateur radio transceiver for ICOM ham radio