Warning: Please note that if you use a USB cable to connect the ULS-XCopter-G2 transmitter and power is supplied via this cable, you must ensure that the cable and power supply allows at least 3A. If the power supply or cable does not allow 5V 3A to be delivered to the transmitter, the device may not work properly. In this case it is recommended to use an external power supply of 7.5-24V connected to connector JX1 - External power and control.