NOAA Weather channels and Weather Alert10 NOAA and Canadian Weather channels are pre-programmed and easily selectable using the dedicated WX key. The channel names may be customized by the user to easily understand the use of each channel. Programmable Channel NamesThe HX400 is supplied from the factory preloaded with description of the use of Marine channels (16-Distress, 22A-USCG, 71-Pleasure). Speaker Microphone ConnectionOptional speaker microphone or headsets are available to assist with your communications needs. Loud speaker audioThe HX400 is designed to be heard in even the noisiest environments with 700mW of power supplied to the internal speaker. The internal scrambler is compatible with Standard Horizon VHF Fixed Mount and Handheld VHF 4-code scramblers. Built-in Noise Canceling Mic and Voice scramblerThe HX400 will surpass your voice transmissions expectations in noisy and windy environments with the built-in noise canceling microphone.No need to purchase an optional voice scrambler for secure communications as the HX400 has it built-in. These channels do require the appropriate Federal Communications Communication license. It also has the capability to be programmed 40 Land Mobile Radio (137-174MHz) channels with CTCSS or DCS signaling by a Standard Horizon dealer.Note: Marine and Land Mobile ChannelsThe HX400 is factory programmed with all USA, Canadian and International and NOAA Weather channels. Description Lithium-ion battery and chargerThe HX400 is supplied with a whopping 2300 mAh Lithium-Ion battery that will keep you talking for about 17 hours.There is no need to worry about the time it takes to fully charge the huge 2300mA battery as the HX400 is supplied with a 3-hour rapid charger.