This is a 25' long RS-232 (4-pin telephone plug) to DB-9 serial plug cable. The RS-232 plug connects to the telescope, while the DB-9 plug connects to the 9-pin serial port on the back of your PC . . .
This 9' cable lets you connect the Gemini go-to system on your Losmandy equatorial mount to your laptop or PC so you can control the mount remotely. . . .
This 6' cable set connects your Autostar-equipped telescope (ETX, LXD-75, or LX90) to your laptop or PC to control the scope remotely and to clone new information between two telescopes . . .