There are several reasons one would want to control their telescope with a PC:
It is faster than using the hand controller.
It gives you a visual aid when searching for something hard to find.
If you find something unknown, the planetarium software will be able to identify it.
It is a necessity if you plan on imaging anything for longer than a single quick exposure.
Specification
Connector : USB to RJ9 4P4C Cable
Chip: CP2102
Length: 180cm
Color: Black
Conductor: Tin-plated copper
Cable: UL2464 26AWG OD:3.5-4.5MM
USB A(RS232) to RJ9 cable, Support WIN XP/7/8/10/ANDROID/MAC OS/LINUX/VISTA.
Note：
If your operating system can not download the drivers automatically, you may need to download and install a driver from https://www.silabs.com/products/development-tools/software/usb-to-uart-bridge-vcp-drivers
Package content:
1PCS USB A(RS232) to RJ9 cable