Both systems feature onboard macros for automatic control without a dedicated PC, and both may be used with AutoPilot® 2010 software, allowing a mix of GSC3000 and VRC2500 systems in your operation. The GSC3000 is expandable to 256 channels by cascading additional GSC3000 I/O units, whereas the VRC2500 is a 16-channel remote control system. The Voice Interface is included onboard the VRC2500; in the GSC3000, the Voice Interface is added as a separate unit.