SBD-1 is a converter that allows you to use up to 3 conventional servos (other than the S.BUS*2 servo) with the S.BUS system.
There are five types of S.BUS SBD-1 decoders:
Dimensions: 41.8 x 12.3 x 8.4 mm (without cable)
*Follow the instruction manual included with the product.