RCA DECT 6.0 Accessory Handset RCA-H5401RE1 RCA DECT 6.0 Accessory handset to 4-Line Corded Base System Does not work independently, and must be used with a RCA 4-Line Corded Base Station For the RCA-25423/25424/25425 (4-line corded systems) CallerID, call waiting caller ID 99# Caller ID memory