Specifications include, but are not limited to: The County of San Diego’s Department of Public Works has a requirement for the rental of portable message boards to be used in emergency situations. The vendor shall provide portable message boards to various locations throughout the unincorporated areas of the County as requested by the Department of Public Works (DPW). Message boards must be fully charged and tested for proper working order at the delivery site prior to acceptance. The message boards shall have the following minimum specifications: - Changeable message board that can display three lines of text and graphics. - Highly visible in both day and night conditions, display automatically adjusts to ambient light conditions. - Solar powered with battery backup L.E.D. display. - Theft deterrent. - Trailer mounted only, and 6’x10’ as a standard size. 2 inch ball coupler tow hitch. - A minimum 24 hours of battery power.