The link to the urinator is www.cleartest.com/products/urinator.html This is expensive and I have read that is is somewhat bulky and makes a loud clicking sound when you unclamp the clamp. For a fraction of the money, you could buy a similiar product at www.pretestedurine.com. The substitution kit minus the urine is only $20.00 . I have used this one myself and it works great. The only differece between the two is the urinator comes with an internal heating element which is why it uses batteries and the other one uses a portable heating pad. The uriantor website has a demo to click on and watch how it works. Hope that helps and good luck beating the bladder cops!