This is the Spektrum H6010 Digital Heli Servo.
Dual ball-bearing output shaft
The H6010 combines an impressive 100 oz-in of torque with a rugged brass-nylon gear train. This performance, along with the smooth precision of its dual ball-bearing output shaft, makes it the ultimate sport servo for everything from .30- to .50-size nitro helis to 600-size electric helis.
SpecificationsSize Category: StandardType: DigitalApplication: .30- to .50-size nitros, 600-size electric helisTorque: 100 oz-in (7.2 kg-cm) @ 6.0VSpeed: 0.14 sec/60° @ 6.0VLength: 1.61 in (41mm)Width: 0.79 in (20mm)Height: 1.54 in (39mm)Weight: 1.7 oz (49 g)Bushing Or Bearing: BearingBearing: DualMotor Type: BrushedGear Material: Brass/NylonVoltage: 4.8V or 6.0V (4- or 5-cell NiMH)