Didn't Get a Frequency Counter In Your Radio? - Easily added to your radio with a simple plug in - On radios equipped with a jack on the back. Universal frequency counter which indicates the frequency of the selected channel. It is designed for use in CB and amateur radios.
The SRA-FC393 frequency counters are a great way to figure out where you're at on the frequency spectrum. Compatible with any CB or 10 meter radio that has an external frequency counter jack on the back of the radio. They're great addons for radios like the Connex 3300 or General Lee that don't come with a frequency readout built-in to the radio. Included is a mounting bracket & hardware, and optional hardwire cord (Disclaimer: The manufacturer provides no instructions or guides on hardwiring the cord into a radio. Do so at your own risk)