Name:Road Safety Radar Solar Traffic Speed Limit Sign Lead acid battery:12v80AH Solar panels:18V 60W Duration:66 hours Velocity radar:K band 24.15GHz + 100MHz Working frequency:K band 24.15GHz + 100MHz Speed range:10km h-250km h Detection distance:> 200 m Speed display:10-199km h, red green double color display. Working voltage:DC12V