No Caller ID * 4-Line Expandable Corded System * System Expandable up to 16 Base Stations * Each Base Station Can Expand to Include One DECT 6.0 Accessory Cordless Handset - Handset Sold Separately * Compatible with the following: GE 29487 and GE 29488 Series, RCA 25403 * 4-Line corded telephone * Expandable to 16 base stations * Compatible with the RCA-25424RE1and RCA-25425RE1, and also the GE-29487/88, GE-25403/404/405, RCA-25413/414/415, and the 25424/425 series * Speakerphone * Intercom (station to station)