... in airport, concert, stadium, Hold this pretty LED Mini Board in the airport or concert for displaying ... electional campaign in the street. If taken our LED badge, the effect will be doubled. The ... product can be inter-connected to other electronic device by RS-232 or RS-485 protocol ... Hours in normal text,- Switches: On/Off, Brightness, Message Selection- Accssories: USB cable, CD, Power Adapter- Windows ...