Link to original page on YouTube.https://kisantech.com/mag/ i’ve waited awhile b4 doing a review on this as i wanted to hard test it. it passed with flying colors! these modulators will save your life. price is on the high side but this unit is top notch plus we run dual headlights. this means basically a double unit. unit is plug n play. you must use nighttime sensor(plugs in easily) cost $169.95 specs: P115W-DHL is a Master/Slave configuration. There are no additional boxes to wire-in, or any wires to be cut. P115W-DHL designed for a motorcycle with dual H7 2-pin Japanese or EURO style headlamps, or dual HB9/HB11 oval plug headlight bulbs. For plug-n-play installation, select Bulb Adapter Option from above. The Aadpters will come pre-installed with the unit. The Dual High/Low DHL-version requires that the lo-beam bulb stays ON, even when the hi-beam is switched on. DHL-version will modulate both bulbs during daytime. pathBlazer circuit modulates the hi-beam current - from 100% ON to about 17% OFF. This is accomplished by using a p-channel MOSFET, which is inherently safe. The MOSFET is designed to fail in the ON state. For additional safety, the circuits DO NOT utilize the lo-beam whatsoever! MAX power rating is 115 watts. DO NOT EXCEED! P115W-DHL comes with a detachable daylight sensor, which simply plugs into the pathBlazer. The daylight sensor functions as a switch; it stops modulation when it cannot see enough daylight. Since the internal circuitry is controlled by a microprocessor, it allows for customizable features.