This is the Futaba GY520 Heading Hold Gyro. FEATURES: Ultra small and light weight gyro contained in one unit-no separate sensor and control unit Utilizes a high speed advanced PID (Proportional-Integral- Derivative) control algorithm Latest MEMS (Micro-Electro-Mechanical Systems) allows complete control system on one chip Delivers superior performance with analog servos and excels with digital servos F3C and 3D mode selectable, six programmable parameters Operates at very high speed; 280Hz in the 1520uS mode and 506Hz in the 760uS mode Programmable through single button and multi-color LED or through a PC using Futaba CIU-2 USB adapter Registered AVCS (Angular Velocity Control System) architecture achieves unmatched tail holding ability One year limited warranty INCLUDES: Futaba GY520 Heading Hold Gyro, instruction manual, one each 13" (330mm) lead with red connectors and lead with black connectors two sections of sensor tape and mini screwdriver REQUIRES: Digital or analog servos SPECS: Size: 0.82 x 0.82 x 0.43" (20.8 x 20.8 x 11mm) Weight: 0.243 oz (6.9g) Voltage Range: 3.8 - 6.0V DC Control System: Advanced PID control Current Draw: 40mA (without servo) Sensor: MEMS vibrating structure gyro Operating Temperature: 14°F - 113°F (-10°C - +45°C) Sensor Rate Range: +/- 800° sec Angular Velocity Range: +- 800 deg/sec jxs 10/21/08 ir/jxs