Bluetooth Remote Easily add a Bluetooth or 3DR radio and control features and parameters of your copter while in flight! Get fancy heads-up displays with telemetry, power output, GPS+GoogleMap and more.  Also control flight parameters while in the air including Position & RTH control parameters. I recommend an Android tablet or phone but you can also use your laptop. If you plan on using a laptop then use the 3DR radios, they are easier to use and work better. Otherwise, with Android we are left with only bluetooth as a choice since they dont support external radio links.