Great Construction Quality wiring material - UL approved. illuminated on/off toggle switch - can easily turn on/off the lights. Inline blade fuse & 40A relay - multiple safety protection. Universal Fit - compatible with all automobiles,Boats and devices equipped with a 10-30v power source. Quick & Easy Install 1. Connect the red+ wire from the fuse to battery +; connect the black wire from the relay to the battery -; 2. Connect the white+;black- wire from the relay to light bar(red/black correspond to the wire of lights bar) ; 3. Connect the red+/black- wire of the switch to battery or any place of your car system to get power for the switch; 4. Turn on on/off button of switch to test the lights bar. Package Included 1 x wiring harness full wiring kit（2 Leads）.
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