Detailed Description  rc helicopter gyro: Product Description:  Input Signal:1.5+/-0.5ms Input Power: 5V~6VDC Weight: 12.5g Size: 27*28.5*18mm  Features: 1. Used for engine and Electric Helicopters; 2. Dual sensibility adjusting model---nose locked model and standard model;  3. Suitable for 4CH transmitter; 4. With a built-in temperature equalizing electrocircuit; 5. To both 6CH and 4CH transmitters,the gain value can be adjusted through crust . 6. Used for 3D aerobatic acts.but not suitable for F3C flying.