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The JMI SGT-MAX with 2 Encoders Kit includes everything you need to control your telescope directly from your computer except the mounting hardware. The system includes a serial interface box (B-Box), encoder cable, 2 encoders, serial cable, a B-Box mounting bracket (specify PC or Mac), and instructional video with a brief demonstration of TheSky software. The software is not included. The kit is designed for those who wish to build their own hardware for mounting the encoders.