• The Celestron RS-232 Cable connects your computerized telescope to a laptop or PC for control via various planetarium software programs
• Attaches to the computer’s serial port and the telescope’s hand control via a phone jack plug
• The Celestron NexStar RS-232 Cable is also necessary for flash upgrades to hand control software
• Cable is 62 inches long
• Requires a Serial-to-USB Adapter (#18775) if your computer does not have a serial port