The Standard Horizon GX6000 is a commercial grade 25 W VHF with an integrated AIS receiver. Ease of operation is one of the great design features of this fixed mount radio by using the larger rotary channel knob, just simply push to enter while accessing menu. NMEA 2000/0183 makes interfacing other devices straightforward. The GX6000 has the ability to be connected to 2Mic options; either two RAM4 or 4 of the wireless RAM4W Mics. Also the front panel MIC can also connect to the rear panel, and if you need to extend it you can up to 20 feet with the MEK-4 mic extension kit. Built into every Standard GX600 are the integrated 32 code (FVP-42 and 4 code (CVS2500A) voice scramblers for communicating with others privately.