OMPHOBBY M2 RC Helicopter MK2 Version RTF with RadioMaster Zorro TransmitterPlease Read Before Purchase The MK2 RTF (Ready To Fly) version does not include batteries for the remote control. This version features a built in ELRS receiver and includes an ELRS compatible transmitter. It cannot bind to older OMP FUTABA protocol M1 or M2 series helicopters. The MK2 RTF helicopter can be made compatible with popular radios such as FUTABA, SPEKTRUM, and FRSKY, but you must purchase the corresponding brand specific receiver