Stir Plate Magnetic
This magnetic stir plate holds flasks up to 5 litres, features and on/off switch, as well as a dial for speed control. There is also a screw-in fuse in the back. Standard 110V power.
Using stir plates with magnetic stir bars help to increase aeration, growing your cell count. Yes, you can do this manually, but imagine how your arm would feel.
A helpful hint from some experienced homebrewers - purchase an extra magnetic stir bar. There are two reasons for this. One, stir bars are easily misplaced, so having a back-up on hand means you are ready to make your next starter. Two, before you pitch your starter, use the extra stir bar to hold the one that is inside your flask to the side or bottom, so that you don't toss it in with your starter.