This is the BLS551 Digital Brushless Low Profile Car Servo from Futaba.
This servo produces high-current draw from receiver batteries
use only NiCd receiver batteries.

FEATURES:

Low profile design suited for 1/10 & 1/8 scale steering applications

Equipped with brushless motor, metal gears and two ball bearings for smooth operation and long life

Same power consumption as brushed digital servos

One year limited warranty through manufacturer

INCLUDES:

BLS551 Digital Brushless Low Profile Car Servo

0.83" (21mm) diameter Round Horn

1.7" (44mm) 3-sided Servo Horn

3x8mm Horn Screw, FUTM2290

Two Rubber Mounting Dampers and Four Metal Eyelets

Instruction Sheet

NOTE, Mounting screws are not included, order FUTM2250 if needed

REQUIRES:

Installing in model, connecting linkage and connecting to receiver

SPECS:

Torque: 102 oz-in (7.4 kg-cm) @ 4.8V 128 oz-in (9.2 kg-cm) @ 6V

Speed: 0.13 sec/60¢X @ 4.8V 0.10 sec/60¢X @ 6V

Dimensions: 1.6 x 0.8 x 1.0" (41 x 20 x 25mm)

Weight: 1.6 oz (44g)

COMMENTS:

For use only with FM, PCM and HRS systems. Not for use with AM systems.