... Display intuitive interface Easy installation Show time while driving interface with the boxSpecification: CommunicationInterface: Serial port (RS-232), USB ... blue-green fluorescent display . Display characters: 2 line x 20 characters / line, 40 characters, 5 x 7 Dots Character size ... , Hospital,airdrome, Station, Post, Bank etc. Double line VFD POS customer display,customer pole display with DC power