Philips DECT 6.0 4-Handset Expandable Cordless Phone System for $69.99 shipped. Here is a screenshot for your reference. This phone uses DECT 6.0 (1900MHz) technology, which reduces interference with 2.4GHz devices (like wireless network). It also features an answering system, speakerphone, Caller ID, and expandability to up to five handsets. It usually sells for over $80.