Camera tracking controller features built-in video switching matrix (8 input 1 output, can be extended). Single-camera has up to 512 position tracking control points. Can be cascade circuit. Supports two kinds of high-speed cloud ball protocol. CPU communicate with external devices like computer or video switch matrix via RS-232 (RS-485) with a linkage control. High-speed tracking ball tracks all the last-open microphone position, when last-opened microphone is turned off, high-speed tracking ball return to the default point, when all in attendance are closed, camera automatically reset to standby position.