1. Interchangeable / Compatible with: All automobiles and devices equipped with a 12V power source.2. Three Flashing Modes: Strobe Pattern A - Alternating Fast Strobe. Strobe Pattern B - Alternating Single Strobe. Strobe Pattern C - Simultaneous Strobe.3. Extremely low power consumption rate.4. Super bright LEDs.5. 30，000+ hours of lifespan.6. Each light block (9 LED light bulbs) is 1.75" (inches) long.7. Waterproof ready.8. Perfect for for front grille and interior.9. Color light: BLue.10.Easy installation process:Each LED light bar would be connected to an 8 feet long extension wire. Each extension wire will then be connected on to the controller. Wire the controller's black (- ground) and red (+ power) to the power source accordingly. Mount LED light blocks to desired location.Package Include:4 x light bocks with brackets.4 x 8 feet extension wires.1 x set of mounting clips and screws.1 x control box with 3 flash modes.No manual but it's easy to operate.