LED color:1R1G1B,1R1G,1R available LED life:100 000 hours Communication way:RS232,RS485,TCP/IP,GSM,Wireless TCP/IP,Wireless RF Pixel array of unit module:16x16 Pixels per square meter:6944 Drive mode:static scanning Best viewing distance:20-50m Kinds of color:16777216 for synchronous mode;8 color for asynchronous Refresh velocity:above 60 HZ Power:AC220V OR 110V DC 12V OR 24V Effective control distance:20m for RS232,1000m for RS485 Operation temperature:-20-80 celsius Operating humidity:10%-90% RH Transferring speed rate:9600BPS RAM Capacity:512K Enclosure:Aluminum case and steel mounting brackets Pixel wavelength:RED 626NM,AMBER 592NM,GREEN 522NM