Download the manual:
https://easyonhold.com/knowledgebase/V-Tech-18445-18447.pdf
The VTech CM18445/AM18447 is a 4-Line Small Business System Main Console (CM18445-Silver or AM18447-Black), that works with the Easy On Hold® 2 Channel Business Audio System, allowing streaming music and messages on hold that sound just like a major call center. Details at easyonhold.com.
