MICTUNING HD 300w LED Light Bar Wiring Harness Fuse 40Amp Relay ON-OFF Waterproof Switch(1Lead) MICTUNING HEAVY DUTY 1 lead Wiring Harness with on/off rocker switch and easy to install. Our packing is being upgraded, so you may receive the wiring harness in the old packing. Both of them are genuine products, please used rest-assured. DETAILS MAKES PERFECT: adopt flexible strand copper wire,up to 300 watt load capacity.It is universal fit for any 7" 10" 12" 20" 30" 40" 50" light bars that is within 300w. GREAT CONSTRUCTION: 40A Power Relay and with inline blade Fuse for multiple safety protection.It is 1 lead that with one lights output connection,it can hook with 1 heavy duty off road led light bar above 180w. GREAT CONSTRUCTION: 40A Power Relay and with inline blade Fuse for multiple safety protection.It is 1 lead that with one lights output connection,it can hook with 1 heavy duty off road led light bar above 180w. CAUTIONs:We recommend professional installation,pls let professinal installer to wire the harness kit; If let the wire short circuit,the harness would melt and even caught a fire,We suggest that wrap all exposed wire with electrical tape to avoid a short circuit; Pls make sure your light within power 300W, or it would got melt as well.