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. See the owner's manual PDF file below for full information.

Dimensions: 23.5 x 21 x15mm
Power Input: 4.2V - 7.0V
Current Draw: 33mA
Weight: 12 grams (with case)
Gain adjustment on unit
Compatible with Futaba, JR, and most other popular radio systems.