Description:    Compatible with the Futaba S.Bus System Servo can be easily programmed with the SBC-1 Channel Setting Tool, S.Bus receiver or PCLink software .Equipped with dual ball bearings Also compatible with Futaba receivers and transmitters manufactured after 1982. INCLUDES: Futaba S9071SB Serial Bus Digital Servo, 1" (26mm) 4-point horn,1.5" (39mm) 4-point horn, 1.2" (31.5mm) 6-point horn, 4 each rubber grommets, eyelets and screws, instruction sheet REQUIRES: Programming, installing in model and connecting linkage Specs and Features  Dimensions: 1-7/16 x 9/16 x 1-1/8" (36 x 15 x 29mm) Torque: 4.8V 53 oz-in (4 kg-cm),6.0V 64 oz-in (5 kg-cm) Speed: 4.8V 0.15 sec/60 Degree , 6.0V 0.11 sec/60 Degree Weight: 0.9oz (25g)