The unit you showed on the first post looks like what we had demonstrated here. We also have a Phillips unit in the office but in our opinion it was not built rugged enough to survive on a truck everyday. We did get references from some other utilities and two fire departments about the Zoll units. This included one company that dropped the unit in it's case off the side of a pier while pulling out other material from the same bin. They fished it out of the water with a long stick and a hand line, the inside of the case was still dry.