Check the listing for details. Hyperion Atlas DS20 Coreless Digital Servo SMD (High Speed). Condition: New. Listed at 9.98 USD. Tap here to read more about Hyperion Atlas DS20 Coreless Digital Servo SMD (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 SMD (High Speed) x 1Specifications:Speed(sec/60deg@4.8/6.0V): 0.13/0.11Dynamic torque(kg/cm@4.8/6.0V): 7.0/8.0Holding torque(kg/cm@4.8/6.0V): 14.0/16.0Gear Train primary material: MetalDimension: 40.0 x 19.5 x 36.5mmWeight: 52.5g