The SBD-1 is a converter for using up to 3 conventional servos (other than S.BUS servo*2) with the S.BUS system.
There are five types of SBD-1 S.BUS Decoders:
200 mm (weight 6.9 g)
400 mm (weight 10.8 g)
600 mm (weight 14.7 g)
1100 mm (weight 24.5 g)
1600 mm (weight 34.3 g)
Plus the SBD-2 S.BUS Decoder unit that can handle up to 8 servos
Dimensions: 41.8 x 12.3 x 8.4 mm (excluding the wires)
Power requirement: Ni-Cd, Ni-MH 4 to 5 cells equivalent battery (Futaba)
Operating Temperature Range: -10 to +45°C