Product documentation for the METROtenna 40 (CM4220HD) can be found here.
Where can I find product documentation for the METROtenna 40 (CM4220HD)?
Have more questions? Submit a request
There's a lot happening in TV. Stay informed!
Stay up to date with important TV industry information that directly affects cord cutters, and be the first to hear about Channel Master special offers and promotions. Channel Master does not share your contact information.
No thank you.