Probably the name of the chip maker. .
That or maybe it stands for Sh*t Quality
I wouldn't buy a $20 camera and expect it to work anywhere near as well as the $100+ camera it's trying to copy.
I have the money i just wanted some cheap one for my dad's car, he doesnt need any high end so i thought i could fit under $30 but looks like i have to add up thanks for answers anyways!