This tiny gyro can do either standard rate or head-lock mode. It has optional dual remote or single on-gyro gain control. It also has built-in drift cancelling and temperature compensation technology.

Features:
Intelligent drift canceling circuit design.
Servo travel limit adjustment
Dual Mode: Headinglock and Standard Rate Gyro.
Built-in drift cancel circuit.
Temperature compensation circuit.
Dual position Normal/Reverse switch for Rudder operating direction.
Dual gain control
Applies to analog and most digital servos.
Perfect for Micro to Mid size helicopters.

Dimensions: 23.5 x 21 x15mm
Power Input: 4.2V - 6.0V
Current Draw: 33mA
Weight: 12 grams (with case)
Gain adjustment on unit
Compatible with Futaba, JR, and most other popular radio systems.