Point 2 - It's a quartz movement, so there's is a quartz crystal vibrating at a billion cycles per second, then there's is a circuit that divides those little pulses into one second "blips" that kick the second hand around.
Point 1 - The movement is mostly plastic and wires, as opposed to a brass mainplate and bridges in a manual/automatic. And as the movement is much thinner than a typical mechanical one, the case is therefore thinner and consequently lighter than a chunk of stainless you get with a Rolex.
Point 3 - With a quartz movement, when the crown is pulled out, it either jams a stick in the little cogs, or turns the battery off, or it doesn't do anything except engage the hand setting components (I don't know what method the cal 1445 uses). Therefore, as the hands don't stop you can't "hack" the time, like those guys in war movies do.
But that's why Delta Force don't use these watches on special ops, only in the O's Mess after the mission.
Hope this helps with your watch learning.
Cheers
Jim