GPS Triggered Unlimited Languages Audio auto play Video auto play 32lanagues tour commentary play simultaneously Stero audio quality High quality water proof HUB,Sub device design Live commentary Smart Interrution Damage auto detect Backlight Keyboard Industrial Grade GPS module Simple installtion and maintanance Fault isolation Airline style design Windows system application software Airline grade 1.44inch TFT color screen Flags display on TFT LCD screen Languages display on screen EMC/EMI design Next station display Over speed alarm driver micphone input current station display google earth/google map station test route unlimited support time alarm Background music Next station display Route directions auto detect Languages fault detect 2Micphone Extra slim in the whole world GPS and manual playback of audio commentaries You will be amazed by the flexibility you have in a smaller,lighter design provided by Tamo technology co.,ltd