This cable is connect PC/Laptop (usb side) to compatible with Skywater AZ-GTI mount auto Guide Specially, other device may not support. USB RJ12 cable compatible with Skywatcher AZ-GTI Theodolite Free hand control PC directly connected to EQMOD cable. please double check your device becompatible withe buy it . Build in FTDI Chip inside .Support all windows version Win7/8/10/XP/, and iOS/Linux/Android. USB to RJ12/6P6C interface cable compatible with Replace the hand control box cable, just one cable connect the AZ-GTI mount . USB connect the az-gti eqmod cable . Operating system support: Windows 10 Windows 8.1 Windows 8.1 x64 Windows 8 Windows 8 x64 Windows Server201 2 Windows Server 2008 R2 Windows 7 Windows 7 x64 Windows Server 2008 Windows Server 2008 x64 Windows Vista Windows Vista x64 Windows Server 2003 Windows Server 2003 x64 Windows XP Windows XP x64 Windows ME Windows 98 Linux Mac OS X Mac OS 9 Mac OS 8 Windows CE.NET (Version 4.2 and greater) Android Windows RT Note: If your operating system can not download the drivers automatically, you may need to download and install a driver from url. Besides, As the feedback from our customer , some customers do not know how to install the driver compatible with Mac OS. advantage from this cable: 1.There are several reasons one would want to control their telescope with a PC: 2.It is faster than using the hand controller. 3.It gives you a visual aid when searching compatible with something hard to find. 4.If you find something unknown, the planetarium software will be able to identify it. 5.It is a necessity if you plan on imaging anything compatible with longer than a single quick exposure. It's wicked cool. Colour:black Material:PVC+Metal Size:Length: about 1.8M Package Contents: 1 x EQMOD Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.