It won't be very funny if the computer died in action ie. during the dive with no back up. And I have to stay above my buddy during the remaining of both dives. Yes, happened twice and I made sure it won't happen again so bought a cheap one as a back up.
I will stay away from RGBM.
Nothing wrong with a used one.
I will stay away from RGBM.
Nothing wrong with a used one.