Check the listing for details. Atlas DS20 Coreless Digital Servo GCD (High Speed). Condition: New. Listed at 11.00 USD. Tap here to read more about Atlas DS20 Coreless Digital Servo GCD (High Speed)These are simply the best servos you can buy at any price, and a great value too.Perfect centering, top ball bearings, available in tough CarbonPoly or all-Metal gear train, Digital torque and precision, and full programmability all put the ""control"" back in your Radio Control!Fully programmable for Speed, Deflection, Centering, REVERSE, and more.Features:Fully programmable full size digital coreless servoDouble Ball-BearingProgrammable with free PC software connected via USB adapter (HP-AT-PRGUSB)Rotation in degrees, Adjustable 30 to 140 degrees total/ 90 degree default (45 each way)Adjustable travel speed from 1% to 100% of Rated Speed (100% default)Maximum input voltage: Unloaded input voltage should never exceed 7.8V/ loaded input voltage max 6.6VIncluded with the package:Atlas DS20 Coreless Digital Servo GCD (High Speed) x 1Specifications:Speed(sec/60deg@4.8/6.0V): 0.07/0.06Dynamic torque(kg/cm@4.8/6.0V): 4.0/4.5Holding torque(kg/cm@4.8/6.0V): 8.0/9.0Gear Train primary material: CarbonPolyDimension: 40.0 x 19.5 x 36.5mmWeight: 51.0gNote: See the Manuals and Support Tab for more details for Full Specifications and Programming Guide