Fit any 12-16VDC systems with negative ground Dual-color models feature three wire units function as red brake light for rear, white running light for front with full contrast amber turn signals Single-color models feature two wire units with single function 45in. leads are pre-pinned on dual color options for easy plug-and-play installation with model specific wiring adapters (sold separately) Aluminum bullet housings with clear acrylic lenses Available in gloss black or chrome finishes Mounting brackets sold separately Sold in pairs.