The unit features a 1‑by‑1.8‑inch LCD display for GPS lat/lon data, a microphone with six quick keys, an extra-large channel-16 key and a rotary knob for channel changing.
The M424 features 25 watts of power and 10-watt loudspeaker output, and is compatible with the new COMMANDMICIV (HM-195) remote control.
The unit uses GPS to enable automated distress calls, position sharing and other DSC features