Futaba
Futaba S3150 For Airplanes (S.BUS)

Manufacturer: Futaba Corporation
Model: S3150
Digital servo for small aircraft
This is a digital servo for small airplanes. It is powered by 4.8V and cannot be used with batteries.
Features
Metal 2-3 gears
Metal final gear
Speed: 0.24 sec/60° (4.8V)
Torque: 3.7 kgf-cm (4.8V)
Dimensions/Weight: 30.0 x 10.8 x 29.0 mm / 23 g
*Power supply: 4.8V (dry cell batteries cannot be used)