ST4 COMPATIBLE AUTOGUIDER CABLE MEADE ATIK AUTO GUIDE KABLE SBIG SG-4 AUTO GUIDER RJ11 RJ12 6P4C KABLEWhen in use, connect one end of the ST4 cable to the ST4 guide port of the guide camera(such as ZWO Zhenwang, QHY and QHY5-II QHY5 etc),and the other end to the AUTO GUIDE port of the equatorial mount. In the guiding software, select ST4 guiding mode, you can guide the star. You can also use Firecapture to guide stars when shooting planets.Here are the pin connections for different camerasST4 Compatible Cable (meade, Atik, etc)celestron SBIG SG-4 cableRJ11 6P6C1 = No Connection2=Ground3=RA-4=Dec-5=Dec+6=RA+Package Contents:1 X RJ11 toRJ11 ST4 CableLength: 1.8M, 2.0M, 3.0M, 5.0MNote: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.