FeaturesFeature 12 or 21 super-bright LEDs3M double-sided tape for easy mountingWork with any 12VDC system with no load equalizer or resistors requiredSequential light bar features "Knight Rider" side-to-side sequencing in running light mode and a flashing brake alertSpecs Bulb Type: LED Height: 3/4" Height: 19.1 mm Length: 19 cm (7-1/2") Length: 19 cm Mounting Style: Adhesive Back Type: Brake Width: 19.1 mm Bulb/Light Color: Red Length: 7-1/2" Product Name: Light Bar Volts: 12 V Width: 19,1 mm (3/4") Filament/Function: Single Height: 19,1 mm (3/4") Lens Color: Red Mounting Position: Rear Width: 3/4" Model: Knight Riderz Number of Bulbs: 21 Riding Style: Street Shape: Oval Units: EachApproximate Package Weight & Dimensions Weight: 0.1 Height: 0.78 Length: 7.4 Width: 5.3