The older style Sinks had the red indicator led, but the newer ones (the 3D models) to the best of my knowledge do not. The 3D that I had did not. Regarding inflation, I was advised by the importer as follows:
"Just inflate the Sink so that there is no more than about 3/16 inch between the bottom lip of the top section of the Sink and the bottom of the bottom section, and all will be fine."
"Just inflate the Sink so that there is no more than about 3/16 inch between the bottom lip of the top section of the Sink and the bottom of the bottom section, and all will be fine."