This is *only* the remote control for an Iris Ohyama circulator (STF-DC15T). * Operation confirmed. However, I tested it on a different model from the same company because I don't have the main unit. * Batteries included. These are the batteries that came with the remote when I bought it. * When checking the batteries, the slot wouldn't come out, so I used a screwdriver to open it, and there are a few scratches (see photo 4).