Futaba SBD-2 8ch S-BUS Decoder The SBD-2 is a signal converter for using standard analog or digital servos with the S.Bus/S.Bus2 system. The SBD-2 connects to S.Bus/S.Bus2 port of the receiver and converts signal to standard PWM signal. Up to eight servos can be used. Compatible with any analog or digital servos as well as programmable digital S.Bus/S.Bus2 servos. Dimensions : 29.6x39.3x15.8mm Weight : 14.2g Battery : 4.8V - 7.4V