One more warning...  Two years ago I was on a project that spec&#x27;d inexpensive transducers from China.  We bought samples from multiple factories and they were all terrible.  Datasheets were vague, and a lot of the transducers didn&#x27;t even meet those weak specs.<p>Ultimately it didn&#x27;t matter much for our beauty product but it would be a big problem if we tried to use them for imaging.