This is the Futaba GY401 Gyro with an S9254 Digital Servo.
             This is a high performance, compact and lightweight
  (AVCS) Angular Vector Control System gyro developed for model helicopters.
Because the sensor and control circuit are integrated, it is simple to install.

FEATURES: AVCS System: Since the rudder trim changes (caused by wind and other
            meteorological changes) the front, rear, and other heli attitudes
            change and are automatically cancelled; tail (rudder) operation is
            easy, making it perfect for 3D flight.
            (also known as heading hold gyro)
          SMM Gyro Sensor: Use of this newly developed technology virtually
            eliminates rudder trim changes during flight (see COMMENTS).
          Digital Servo Compatible (DS Mode): DS mode makes it compatible with
            Futaba Digital Servos. This maximizes the high-speed response
            performance of the Digital Servo.
          Included high-speed S9254 Digital Servo boasts 47 oz-in torque and a
            speed of .06 sec/60°
          Remote Gain Function and Mode Switching Function Remote: Gain
            function allows sensitivity switching from the transmitter and mode
            switching function allows AVCS/normal gyro mode switching.
          Integrated, compact and lightweight design made possible by high
            density mounting technology.
          Conductive Resin Case: This case improves EMC (Electrostatic and
            electromagnetic interference) resistance.
          One year warranty

INCLUDES: One GY401 gyro
          One S9254 Digital servo, available separately FUTM0224
          One  .81" (20.5mm) round servo horn, one 1.8" (45mm) round servo horn
            one 1.25" (32mm) 6 point servo horn, one 1.5" (39mm) 4 point horn,
            mounting hardware
          One mini plastic adjustment screwdriver
          Three mounting pads
          One instruction sheet

SPECS:    GY401 Gyro-                     S9254 Digital Servo
            Length: 1.1"  (27mm)            1.6"   (40mm)
            Width:  1.1"  (27mm)            .79"   (20mm)
            Height: .79"  (20mm)            1.4" (36.2mm) not including horn
            Weight: .95oz (27g)            1.8oz (50g)
                                            Torque: 47 oz-in
                                            Speed: .06 sec/60°

COMMENTS: Can be used in helicopters and airplanes (Due to 0-100% Gain Adjust).
          The new SMM (Silicon Micro Machine) technology is the integration
            of mechanical elements, sensors, actuators and electronics all
            brought together on a common substrate chip. This hobby industry
            first, results in a gyro sensor with an unprecedented level of
            functionality, reliability, and sophistication.
          This will not work with JR Digital servos. These have a different
            pulse.
          Voltage- use only with a 4.8V battery. (if you use it with a
            higher voltage battery it needs to be regulated to 6V)
                                                                    jxs 2/24/04
                                                                         ir/jxs
                                                            updated jpg 3/16/06