That's starting to get pretty deep! We have the BlueROV2 rated for 100m, which we feel is the maximum safe depth we are confident in and have repeatedly tested at. That being said, it is a pretty conservative number, and we have had one down to 135m for a short time without any problems. The lights, penetrators, thrusters, dome, buoyancy foam, and 3" enclosure should all be fine to even deeper, but we have not yet tested them extensively beyond 100m. The first thing to fail on the BlueROV2 will be the 4" enclosure, which is why we are working on an aluminum 4" tube that will hopefully allow us to upgrade the rating to 250m without changing anything else. This will likely be on sale in the next few months. Until then, going beyond 100m with a BlueROV2 is an at your own risk venture which we do not recommend and have only tried once, beyond 135m is completely unknown to us.