While they're slightly different, but because they listen and I want to be careful of that. So let me make it generic, though. They all are -- they all solve a similar problem of what we will call aging stabilization. So it turns out that all silicon photonics transceivers, the output laser itself. It during its first 24 to 48 hours of continuous use in operation, the output efficiency drops and the power. Therefore, for the input power, you get less output power. That's a big problem with multi-channel fiber optic communication transceivers. You can't have each of the four laser wavelengths. Think of colors and different power outputs. They all need to be balanced, okay? or else you lose bandwidth. And so they all specify the output power to be stable over time. But in order to do that, one of the manufacturing process steps is they need to stabilize the lasers, which our tool does. They've always had to do this. The traditional device though was done discreetly and it was burned in or aged in, in most cases, home grown test base in big rooms and they were hand placed in it. And 48 hours later, you would come back and the thing has aged. And then you test it and it really meets certain qualifications, you pick it out and you can't place it into these transceivers. Now, keep in mind, these transceivers for these high-performance ones were several hundred dollars, $700,000, $7,000 a piece. The real jewel, if you will, in silicon photonics that, FOX like the intel of the world, they are out claiming is the scalability basically taking a silicon wafer, creating all of the transceiver components on it and then effectively overlaying or attaching these laser processes so that the laser is directly attached to the silicon. The trick is those lasers still must be aged or stabilized. And what we do is we can stabilize them in wafer form. We test all the lasers on a single wafer, thousands of them in parallel which gives. It allows you to maintain the cost effectiveness in the scale of doing wafer level silicon photonics devices. So it is an enabling capability. So in all of our customers, we're doing the stabilization of those lasers. And when we talk about silicon photonics devices. Now each of our customers also buys slightly different things in terms of test and other types of functional infant mortality performance related to specifications that are unique to them. That makes our system more valuable to them. But they're all a little bit different.