W Mall&reg; Spek AR6100E DSM2 Compatible 2.4Ghz 6-Ch Receivers 2pcs Spektrum AR6100E 2.4Ghz 6-Channel Because it uses advanced DSM2 technology, it is only compatible with DSM2 aircraft radio and module systems. It also boasts a wide input range that allows it to operate with 3.5- to 9-volt electrical systems Full Range Aircraft Receive of Channels 6 Compatible only with DSM2 aircraft radio and module systems