The control of the acrobee consists of the Flight Controller (FC), the Receiver that is built into the FC and the Transmitter (TX). In order for this system to work correctly all parts of the system must be working.
Description of Problem
In this section we will take a look at not being able to arm.
This can be caused by a missing or damaged FC antenna, having the wrong settings, or physical damage to a part.
Please make sure it is configured correctly
If the above did not fix your issue or if there is no red light, please take a video and show the behavior in a ticket along with your order number.