Orion Skyquest XT10i Intelliscope Newtonian Reflector Telescope on Dobsonian Mount
A close encounter with the Orion XT10i Newtonian Dob with Intelliscope Object Locator
As you can see all the parts are nicely wrapped, and it comes complete with the COL, a PP3 9v battery, the cables and the Altitude Sensor (the Azimuth sensor will be found later in the main telescope box).
More detailed sections then describe;
The second, smaller port is for an optional serial port cable used for connecting the COL to a laptop or PC. The Orion XT Dobsonians are push-to telescopes - there are no motors, so they cannot be remotely positioned by astronomy software. However the output from the digital encoders in the base can be routed via the COL, out of the serial port to a laptop where astronomy software can be used to monitor and hence "show" what the scope is pointing at. This is a great feature and really helps you see what other interesting objects may be in the vicinity to the stars you first started observing, and because astronomy software usually superimposes the size of your eyepieces over the skymap, you can tell which stars should be included in the field of view.
The Altitude Sensor gets fitted to one of the upright support sides of the dobsonian base. The circuit board contains the "hall-effect" digital encoder sensors which interact with the circular magnetic disc. The disc is screwed tight against the altitude axis so that it rotates in relation to the circuit board.
And this view shows the two hall-effect sensors and the critical gap between them and the magnetic disc required for them to operate correctly. The distance is maintained simply by the construction of the unit.
The Azimuth Sensor likewise has a similar required gap, but due to the way you can put the base together, and the washers used it is possible to affect the gap distance which can stop the sensor working accurately (this will be discussed in detail later on). It's not a major problem but just something to be aware of.