Here are my feedback about the dive com, I brought it to Tioman last weekend, I used it together with the OSTC for comparison:
In a simple word, this is a basic dive computer, the computer will automatically turn into dive mode when in the water, just like any other computers:
In comparison with OSTC display
When in the water, nothing can be changed, the buttons are inactive, it displays
1. Battery level,
2. water temperature,
3. Dive time,
4. Current depth,
5. No Deco Time,
6. Current Time, this is usually no present in most Dive com.
7. The safety stop timer starts down count from 6Meter depth (not shown in the pic), display at the right bottom.
The advantages I see in this dive com are the big digits display, that is good for senior divers (in age) and the back light display easily seen under water especially for night dive, you don't need to shine the torch and can read it directly
The picture on the left is the display of DeepBlu, the one on the right is from OSTC (Oled display).