Cobra's HH Road Trip incorporates SoundTracker, a patent-pending technology that dramatically improves the sound quality of the transmission and reception of CB radio signals. 4W, 40 CHANNELS SOUNDTRACKER® FEATURES HIGH-EFFICIENCY FLEXIBLE ANTENNA 10 WEATHER CHANNELS DUAL WATCH FULL CHANNEL SCAN HIGH/LOW POWER SAVER AUTO BATTERY SAVER INSTANT CHANNEL 9 & 19 LCD DISPLAY SPEAKER/MICROPHONE JACK SIGNAL STRENGTH & POWER OUTPUT METER CONTOURED ERGONOMIC DESIGN KEY LOCK INCLUDES MAGNET-MOUNT MOBILE ANTENNA, BELT CLIP, WRIST STRAP & DC POWER SUPPLY