The controller needs to be powered on to pair to the drone. There are two ways you can power on the drone.
Powering over USB
Powering over USB cable is the preferred method. The micro USB port is underneath the antenna on your controller. Connect the other end of the cable to a USB port on your computer.
Note: Press the Power button to switch from “Link” state to “Flight” state. If you see “Link” state, you are in programming mode and the controller will not work for flight control.
Powering with AA batteries
On the back of the controller, slide down the battery lid with your thumb and insert two AA batteries. They must be non-rechargeable batteries, since rechargeable batteries may not supply enough current.