... Bus LED Sign 1.bus side display 2.programmable via remoter ... . .There have many types, Mono color, Tri-color, Full-color, indoor, and customization. Programmable Bus LED Signs Features: ... seconds 3 different buzz sound can be added anywhere within the message Interface of the ... Green, Red+Blue, White+Yellow, etc), RGB Full-color available Actual Application effect Frame illuminationBlack aluminum, ...