... a DSM2 system for Quad-copter, compatible with all JR, Spektrum DSM2 system 2.4G range 5ch up remote ... a DSM2 system for Quad-copter, compatible with all JR, Spektrum DSM2 system 2.4G requiring full range 5ch ... up flight control sensitivity by the remote control sensitivity channel (GEAR). 50% as the dividing line, when sensitivity value is ... . DSM2 4-axis Flight-Ctrl Board receiver for JR / Spektrum