2pcs OrangeRx R615X DSM2/DSMX Compatible 6Ch 2.4GHz Receiver w/CPPM Compatible with all DSM2/DSMX 2.4GHz Air transmitters and now featuring CPPM! Use with multi-rotor flight controllers such as the KK2.1, APM, MultiWii and others. Super light weight 3.7g / 9.8 grams with case 6 Channels Compatible with DSM2/DSMX 1024/2048 aircraft radio and module systems