Spektrum DX3E 3-Channel DSM Surface Radio System 3-channel surface system Spektrum 2.4GHz DSM technology Includes SR300 DSM 3-channel receiver One S200 digital servo included One model memory 2-position, 3-position or linear auxiliary setting Steering dual rate knob for easy adjustment Independent travel adjustment dials for all three channels Battery voltage level indicator LEDs Servo reversing on all three channels Compatible with DSM2 and the MR3000 receivers, in addition to DSM surface receivers 4 AA alkaline batteries and a medium-size gr