The USB Instruments are a new series of Simkits high quality Simulated Aircraft Instruments. They contain a dedicated Microprocessor which connects the gauge directly to your PC. No CCU or other controller is needed anymore to drive this gauge! The fast-build kit comes with all parts needed and include a USB cable to connect directly to your PC. When multiple USB gauges need to be connected to your PC you can order the new 7-port USB HUB including the separate Power Supply to drive the servos.