Abstract: A portable lightweight vehicle signal flag and warning light is presented comprising a boom which has at least one pair of opposed lenses and a slotted-block which is pivotably attached to the boom. The slotted-block slips over the vehicle window and the boom may be adjusted by tightening a transverse bolt and wing nut. Between each pair of lenses is a bulb flasher assembly which is connected to the vehicles electrical power by a cord and cigarette plug adaptor. On the the bottom of the boom is a signal flag which can display a variety of emergency or warning messages. The bulbs are made to either blink to light in a sequential fashion.