Building a HomeBrew GPS for the Celestron Nexstar Telescope AUX bus
NexStar 8 GPS and Equipment
Amazon.com : Celestron - SkySync Telescope GPS Accessory – Automatically Updates your Telescope with 16-channel GPS Data, Time, and Date - Save Time & Improve the Accuracy of your Telescope Alignment, Black (
NEXSTAR 11 GPS CELESTRON - WITH MANY EXTRAS!!! | Astromart