Dynamic-effort movements take a little practice to get right, but once you get there, you'll feel the impact. Although the sets and reps are low, I want you to use light weight— about 50-60 percent of your 1RM. The key to these squats is to pause at the bottom and then explode out of the hole as quickly as you can. Teaching your body to move with speed will increase the power you can produce when you have more weight on your back!
When you're done with a set of squats, move to the vertical jump. Hold a dumbbell in each of your hands, squat down, and then jump as high as you can. The point of doing these exercises is power, so don't do extra to get your heart rate up. You'll get enough of that later on.
If you can't use all four pieces of equipment, look for suitable substitutes, or perform straight sets with short rests.