I used one for a few months on my desktop scanners. It had a slight bit of better reception over the RS 800Mhz duck on a stationary frequency I used to monitor. But it still all came down to me liking and using the RS 800Mhz duck better. The Seeker was very top heavy for a handheld scanner, that bottom gray section contained the BNC connector and it covered the entire BNC jack. Heck I bought that back some years ago when I was new to scanners lol.
-Monitoring The Suffolk County TRS-