This DENALI DataDim™ dual intensity controller allows your DENALI lights to go from half to full intensity with your vehicle's original high beam switch. All DENALI 2.0 Light Pods feature a dedicated 3-wire dimming circuit so that an external signal can reliably control the intensity of the LED chip at the source.
This will allow you (for example) to pair low beams in 50% mode and high beams in 100% mode.
Please note, if you wish to control the intensity of your lights separately from the rest of your equipment, you will need to install the 3-position switch 30500042