EZ Guide 250, Trimble, DGPS, Patch Antenna. Trimble EZ-Guide 250 Lightbar Guidance System. With common-sense interface and a color screen, the EZ-Guide. 250 lightbar is easy to operate right out of the box. Provides 68 pass-to-pass accuracy with Ag15 antenna. Optimized guidance accuracy with OnPath. Filter technology for use in any part of the world. …