Avoid that tool and that seller - I had issues with him on a purchase - was a nightmare to deal with - a nightmare to send back a cheap defective item, and made me wait the full 30 days for a refund only given when paypal forced it.
Looks like the same trigger I have on a wand - lasts for about a week before it starts dripping to a point where you have to turn your valve off before setting it down or you'll be using a water claw to pull from the pad.