Features: The RS232 cable connects your computerized telescope to a laptop or PC for control via various software programs. The RS232 cable is used to connect your PC or computer to computerized telescopes via a port in the hand control. The large adapter attaches to the serial port of your computer. If your computer does not have a serial port, you will need a Serial-to-USB cable, so that you can connect the RS232 cable via USB port instead. The other end of the cable terminates in a phone connector and simply snaps into the port for this purpose. Attaches to the computer’s serial port and the telescope hand control via a phone connector. The RS232 cable is also necessary for flash upgrades to hand control software. Specifications: Materials: ABS metal Length: 1.8 meters / 70.87 inches Package Includes: 1 PC DB9 to RJ9 Adapter Cable Note: Please allow 0–1 cm error due to manual measurement. Due to differences between monitor displays, the picture may not reflect the actual color of the item.