... alarm,forklift alarm,forktruck alarm,forklift accessoriesSpeeding Alarm, alram for car, anaunciator,alertor, beeper,warner Features* Announce bus stop ... .* Automatic announce or manual operation * Support 99 bus lines , two directions for each line, each direction 80 bus stops ... 24V* Rated power output: 10W*2 (8Ω ,24V)* Support external LED screen to display information.* Host dimension:134mm*97mm ...