This is a Hitec Digital, Super Speed, Metal Gear, Programmable Servo that will work with Futaba J, Hitec S, JR, and Airtronics-Z radio systems. EPA, Speed, Direction, and Fail-Safe Programmable (see COMMENTS). MOSFET amplifier. Gold plated contacts. Three metal gears Dual ball bearings. Indirect drive long life potentiometer. High standing torque. Watertight and dustproof. Includes blue aluminum, heat-treated servo arm (see COMMENTS). Works with fixed winged aircraft and helicopters up to 40 pounds, 1/10th and 1/8th on- or off-road vehicles. One digital high torque servo with 12" wire and S/JR/Air-Z connector One white small X-shaped servo horn. One red Large X-shaped servo horn. One white adjustable servo horn. One white off-set straight servo horn. One white disc servo horn. One blue aluminum, heat-treated servo arm horn. Four 2 x 14mm mounting screws Four brass eyelets Four black rubber vibration isolators. Hitec, JR and Airtronics-Z radio system Speed: 0.17 sec/60° at 4.8V Speed: 0.14 sec/60° at 6.0V Torque: 109.7 oz-in at 4.8V Torque: 130.53 oz-in at 6.0V Length: 1.59" (40.6mm) Width: 0.77" (19.8mm) Height: 1.48" (37.8mm) Weight: 2.11oz (60g) Programming the failsafe: In order to program the Fail-Safe on this servo. Modeler will need to purchase the Hitec field programmer sold separately. The metal servo horn will fit any Hitec servos that have a "+" stamped on top of the output shaft. baw 2/15/01 ir/jl updt jxs 8/18/04 updt jxs 2/13/06 &