Align RH25E04X T-Rex 250 Plus DFC RTF All you need to do is simply bind the Align T6 or Futaba S-FHSS 2.4G or Spektrum DSM2/DSMX or JR DSM2 satellite and transmitter than fly it. The helicopter utilizes DFC rotor head assembly, paired with 3GX MRS flybarless system optimized for T-REX 250 PLUS DFC flight characteristics Without any adjustment or tuning, this combo will provide optimal stability suitable for pilots of all levels