GPS Receiver for Orion GoTo Telescope Mounts Automatically supplies GPS location and time data to your SkyQuest XTg GoTo Dobsonian, Sirius EQ-G mount, Atlas EQ-G mount, or SkyView Pro GoTo mount A must for intermediate and advanced amateur astronomers who visit different locations for observing and astrophotography Reduces the amount of time spent entering information for alignment of computerized telescope mounts Supplies both geographical location and time data retrieved directly from GPS satellites Includes USB interface and software for Windows computers - requires Orion GoTo hand controller with firmware version 3.10EQ or 3.08AZ or later