1,suit for outdoor sign, advertisement . 2,we are factory 3,energy conservation 4,easy to use 1,led single color 's characteristic: (1 ... same color,and keep the long lifetime. (5),suit outdoor advertising .2,led single standards attributeparameterapertuer9mmcoloryellowvoltage5Vpower0.1wviewing angle120°(round head) / 180 ° (even ...