Cobra 25-Watt VHF Marine Fix Mount Radio, MR F45: * Alerts with an audible tone and visual alarm if threatening weather is nearby * The Cobra 25-Watt VHF Fixed Mount VHF Radio meets internationally recognized requirements for RTCM- SC-101 Digital Selective Calling that allows you to send a distress signal at the touch of a button or exchange position information with other boats or stations * This marine VHF radio, MR F55 Monitors 2 user-selected channels at once * Provides maximum ease of use even at night * Confirms key activation; this feature is selectable and can be turned On or Off * The marine VHF radio, MR F55 features dual output power for short and long communications * Instant access to national all hazards and weather information, 24 hours a day * Cobra VHF marine radios meet JIS7 standards; submersible for 30 minutes in 1m deep water * Blocks background noise * Controls allow changing of channels and setting features * Instant access to channel 16 and channel 9 for emergency situations * Allows high visibility of function keys * Cobra VHF marine radios show the strength of outgoing and/or incoming signal * When connected to a Cobra or most other GPS receivers, you can send your position to other boats in an emergency, or exchange position information with other boats or stations * Scan all channels to find conversations in progress * Similar to the Caller ID function on a telephone, it will capture the caller"s MMSI ID number and any other data included in a DSC message * Allows connection of an external speaker (sold separately) * Allows operation on any of the 3 different channel maps established for these areas