The table seems to be a tabular form of the graph above it.
Just voltage (V) x current (A) = watts (W) against time it can supply that wattage.
In the first box it says it will deliver 9.6 volts drawing 32.4 Amps but it'll be flat in about 5 minutes. The voltage might start off at 12v but any load drawing that much current will pull the voltage down quite quickly at that rate.
Not even sure that it would be that efficient, looks like a generic made in China gel cell but if it's the right price and you're not drawing huge currents it'll be okay. Just make sure you get a decent gel cell charger, they don't like being over charged by a boggo 12v wet lead acid car type charger ( guess how I found out!)