This dry machine, is operator friendly. The patient is on the dry machine, lies down, and we put the right upper quadrant to the right spot. There is an x-ray capability, an ultrasound capability. In biliary lithotripsy, we use the ultrasound to find the stone. And by the ultrasound there is a shield (I will show it to you) it has 6 lights on it (red lights) and carries the image to the ceiling like a NASA space system. There are two sensors there. Through those sensors the image goes to the computer. This is a pretty interesting technology and works for our patients benefit. There is our area spark gap under it and there's a column (water column). Patient's right upper quadrant gallbladder is going to come to that point and then we will catch it (which I will show you step by step) by the ultrasound image. Let's go step by step.