Garmin VHF 300 Marine Radio: * Space-saving black box configuration * Up to 25W transmit power * Allows user to operate every feature using the included GHS 10 OR GHS 10I full-function wired microphone * Supports up to 3 microphones * Includes a 4" active speaker for on-boat intercom capabilities * Full Class D digital selective calling with built-in dedicated receiver * NMEA 2000 and NMEA 0183 interface capabilities * Connects with NMEA 2000-capable Garmin chartplotters and autopilots * Locates and keep tabs on up to 3 other vessels * Automatic and manual fog horn signals * Hailer/fog horn output: 30W * 2-way hailer functionality * Voicemail feature allows users to record a 15 sec message and send it to another DSC-capable VHF radio * Replays up to 90 sec of the last incoming voice transmission * Local receiver mode improves receiver performance in busy port environments * GHS 10/10I has dedicated button for easy, 1-touch access to channels 16/9 * Receives NOAA weather alert * Auto power on