You could of course use one lever for two engines when flying multi-engine, but it gets much more realistic when you start to use the CH Products Throttle Quadrant. The CH Throttle Quadrant comes with eight detachable lever buttons (4 black, 2 blue, 2 red) which you can attach in any configuration you prefer. Apart from six levers, the quadrant has six buttons on the front, each having two functions (up/down).