1.5-or 2.1-inch Characters Mono/Multi-color Characters Remote Control or PC message entry Max. Viewing distance up to 100 feet Aluminum alloy enclosure Power source:100-240V AC,12V or 24V DC Sign memory: 512k bytes Memory retention: 10 years Message presentation modes: 26 modes Operation Temperature: 0 degree to 70 degree Power cord length: 1500mm Case material:Aluminum alloy Mounting method:Mounting to wall and ceiling Optional communication ways: RS232, RS485, USB,TCP/IP,Wireless,GSM.