This peq includes its own pressure pad. But it will work with the dual switch. With the dual you can configure the peq to independently operate between the laser and led light or both simultaneously. The The attachment point of the peq tightens nicely onto your rail. Adjustment of the light or laser does not seem to be possible as my directions were not in the box. The sticker sheet that comes with the peq is very detailed and from what can tell. The light on the peq is good. The spread and distance is just a couple of feet. Laser works as normally. Light will not disorient othets unless within a couple of feet. Quality is great but one of the defects on this model is it splits open on the seem whete its screwed together. Seen many of them have this problem. Brand new they are tight and no visible separation, over time it becomes more . The "Fire" button on the top side of the peq works with eack option on the selector . This "fire" button is a on/off not a momentary switch.