This is the Futaba S3115 Micro High Torque Servo. It replaces the Futaba S3101 Servo.
This servo can produce high-current draw from your batteries if using NiMH or LiPo batteries, make sure they are capable of delivering sufficient amps.

FEATURES:
Ideal for electric planes and small electric helis
Nylon gears
One year warranty


INCLUDES:
Futaba S3115 Micro High Torque Servo
One 1" (25.4mm) 4 arm servo horn (installed on servo)
One 1.5" (39mm) 4 arm servo horn
One 1.75" (45mm) straight servo horn
One 1.4" (35mm) diameter round servo horn
Two eyelets
Two rubber grommets
Two 2x12mm washer head self threading screws (phillips head)


REQUIRES:
Installing in aircraft and connecting to receiver


SPECS(4.8V):
Torque: 39 oz-in (2.8 kg/cm)
Speed: 0.15 sec/60¢X
Dimensions: 1.1 x 0.5 x 1.2" (28 x 13 x 30mm)
Weight: 0.60oz (17g)
Lead Length: 6.5" (165mm)


COMMENTS:
Do not use S3115 servos with gas or high power engine models, large gliders, or other models that require high torque
Using supply voltage higher than 4.8V or applying high load to the servo will shorten the life. Always use the servo horn specially designed for this servo.
Do not use conventional servo horns.
Excessive force or shock to the servo horn may damage the ultra mini precision gears inside the servo.
For replacement gears use part number FUTM3404