Aerospace Spektrum AR635 6-Channel DSMX/DSM2 AS3X Sport Receiver SPMAR635 Channels: 6Modulation: DSM2/DSMX Band: 2.4GHz Designed for park flyers, sport planes and 3D airplanes up to 90-size electric airplanes (not designed for nitro or gas aircraft) Combines the security of DSM2/DSMX technology with the precision of the AS3X System