I have a Sensus Pro - in appearance it is a small black plastic box with a loop on top for a velcro strap (to attach to a d-ring). On the back of the box are three electrical contacts and a water sensor opening. You just wear it during your dive, then that evening (or whenever - it holds 80 hours of data at a 10 second sampling rate), you download it to your Palm or Computer. I mainly use mine with my Palm. I get three screens for each dive: The first screen shows start & end times, surface and depth temperatures, maximum and average depth. Screen two shows graphic profiles of the dive, and dive temperature. Page three is the raw data listed for each data sampling point - and you can set the sampling interval for any interval down to 1 second.
The computer program has some additional boxes for tank pressure (and calculates SAC rate), dive buddy/ location information, and general comments.
Software for both Windows and Palm, as well as a serial connection cable are included in the unit price, which was $110, last time I checked.
