The Superhero Database Classification number, or SHDB Class, is a number that represents the overall 'power' of a character. All traits of a character are used for calculating the Classification.
What it DOESN'T mean
This doesn't mean that a higher class would always beat a lower class character. But the bigger the difference in Class is, the more obvious it is who'll win in a fight.
How is this calculated
( INT^1.3 + (STR*0.5 )^2 + (SPE*0.5)^2 + DUR^1.6 + (POW + (SPS*SPL))^2 + COM^1.8 ) ^ TIER
Super Power Score and Level
Every Super Power has a score (SPS) that is used to calculate the Class. Each Super Power also has 3 levels (SPL). The level is set when connecting that Super Power to a character. The level determines the final score, of the Super Power, being used in the calculation.
Cheetara with 6th sense mastered <-- turn on sound
She can fire telepathic beams across the globe, destroy machines and buildings from hundreds of kilometers away.
Cheetara is also skillful in battle, can run incredibly fast - in one episode even faster than time itself - so her speed could be comparable to Quicksilver or even to the Flash (I'm not sure).
Like all Thundercats, she gets amped when Lion-O used the Sword of Omens, and she can also transform her weapon - a quarterstaff - and give it powers to emit energy bolts, flames, or whatever else the plot requires.
All in all, she's pretty powerful (but like most characters in the show, she often jobs or has PIS, too).