... is a DSM2 system for Quad-copter, compatible with all JR, Spektrum DSM2 system 2.4G range 5ch up remote The ... is a DSM2 system for Quad-copter, compatible with all JR, Spektrum DSM2 system 2.4G requiring full range 5ch up ... first flight. DSM2 4-axis Flight-Ctrl Board receiver for JR / Spektrum