The simple hook-up to sophisticated programming. Ideal for use with the GY520 gyro and MC401CR, MC601 or MC850 electronic speed controls. Includes USB connector and a 19.7" extension. Requires PC with Windows® 7 32bit, Vista 32bit, XP 32bit, or 2000 operating system and USB port.With the CIU-2 PC Interface you can program S.Bus functions such as travel, end point, offset and more!