Optex USB to Serial Adapter Cable is suitable for use on Celestron Telescopes, Meade Telescopes & SkyWatcher GOTO telescopes to update the firmware, install software or control of the telescope via computer.
This Optex USB Adapter converts the RS-232 or serial output supplied with many goto telescopes to USB 2.0, making the connection between telescopes and computer possible.
Please read the instructions carefully from manufacturers website regarding updating handset or telescope firmware as below:
Celestron Firmware Updates
SkyWatcher SynScan Updates
Meade Autostar Updates
This useful USB to serial adapter is also fully compatible with many other devices that can be converted to USB such as printers and scanners.
The only downside is the product CD which comes with this product there is no drivers on there for Windows 8/ Windows 10. If you search google for "CH341SER.zip" this contains the right drivers for these operating systems. Here is the link to them http://www.arduined.eu/ch340-windows-8-driver-download/ (Posted on Dec 01, 2016)