LED lights meaning:

Red LED—power; blue LED—flying mode; green LED—unlock;

How to connect a receiver:

It gets a RX-S port (1.25mm 3P) which is special for connecting an outside receiver, it supports signal input of PPM, DSM2/DSMX, SBUS (note 1), it also support 3.3V or VIN output (Note 2), in order to connect an outside receiver, short connecting pads on RX-S and changing type of receiver on GUI at the same time is the way. Besides, it supports integrated DSMX/DSM2 or FUTABA SFHSS compatible receiver (Note 2)

Notes: 1) it supports signal reverse;

2) When output is VIN, and VIN>5.5V, please make sure if the outside receiver supports 5.5V or more, or the outside receiver may be burnt;

3) As it gets an integrated receiver, as soon as the integrated receiver is set to output banned(RF circuit of the integrated receiver won’t work at the moment), the outside receiver can work without problem.