This is the Futaba GY611 Gyro with the S9256 Digital Servo.

FEATURES:

• Super narrow pulse drive system substantially improves servo response
• Microcomputer high-speed arithmetic processing substantially improves gyro response
• High-resolution 12-bit A/D (Analog to Digital) accurately converts sensor output to a Digital Signal
• SMM (Silicon Micro Machining) micro-machining mechanical parts and systems right on a silicon chip and also low-back aeroform case improves vibration resistance and neutral characteristic
• AVCS (Angular Vector Control System) (same as Heading Hold) system requires a high-precision angular velocity detection function and extremely small output drift by using a new type of gyro sensor This minimizes rudder neutral position drift during flight and eliminates the need to trim the rudder during flight.
• Futaba S9256 (FUTM0226) Digital Servo is fully compatible with super narrow pulse drive and features high response (.06 sec/60°)and Alumite case with heat sink to cool the motor

INCLUDES:
Futaba GY611 sensor, control amp, S9256 servo, mini screwdriver, 3 sections double sided tape and instruction sheet

REQUIRES:
4.8V Rx battery ONLY (higher voltage could damage the servo)
Assembly and adjustment onto the helicopter

SPECS:
GY611 Ratings;
Yaw-axis stabilizer for helicopter (rate gyro)
Display Device: 8-character dot matrix Liquid Crystal Display
Operating Voltage Range: DC 3.8V to 5V
Current Drain: 70mA @ 5V, including sensor
Dimensions: Amp 2.2"x 1.2"x .59" (57 x 32 x 15mm)
Sensor 1.2"x 1.2"x .71" (30 x 30 x 18mm)
Weight: Amp  1.19oz (34g)
Sensor 1.05oz (30g)
S9256 Servo Ratings (FUTM0226);
Dimensions: 1.6"x .79"x 1.4" (40 x 20 x 36.6mm)
Weight: 2.01oz (57g)
Speed: .06 sec/60° (at 4.8V)
Torque: 47 oz-in (3.4 kg-cm) (at 4.8V)