This is a Hitec Digital, High Speed, High Resolution, Metal Gear Programmable Servo.

FEATURES: Coreless motor
Ideal for large airplane models
Gold plated contacts
Titanium gears
Dual ball bearings
High speed
Water and dust resistant

INCLUDES: Digital high speed servo with 12" wire and universal connector.
2" servo arm
Blue anodized aluminum 1" servo arm
Heavy duty 1-1/2" servo arm
Heavy duty 2-3/4" servo arm
Black disc servo horn
Four 2 x 14mm mounting screws
Four brass eyelets
Four black rubber vibration isolators
Plastic case and programming instruction sheet
Hitec decals

REQUIRES: Radio system

SPECS: Speed: 0.19 sec/60 degrees at 4.8V
0.15 sec/60 degrees at 6.0V
Torque: 249.96 oz-in (18 kg-cm) at 4.8V
333.29 oz-in (24.0kg-cm) at 6.0V
Length: 1.57" (40mm)
Width: 0.78" (20mm)
Height: 1.45" (37mm)
Weight: 2.29oz (65g)

COMMENTS: A note on coreless motors-a conventional servo motor has a steel core armature wrapped with wire that spins inside the magnets. In a Coreless design, the armature uses a wire mesh that forms a cup that spins around the outside of the magnet. This arrangement is much lighter resulting in smoother operation and faster response time.