content: The sound quality is very, very good. I've been using 5.8 GHz, 2.4 GHz and a long time ago the 900 MHz cordless phones and there does not seem to be any comparison. The DECT 6 produces superiorVTech 6032 - Cordless phone w/ call waiting caller ID & answering system - DECTsound quality. I can actually use my land line now for making calls without the annoyance of static interference.