Panasonic KXTG2670N 2.4 GHz DSS Cordless Speakerphone with Digital Answering System Cordless 2.4 GHz digital spread spectrum operation All-digital answering system (15 minutes) Dual-digital duplex speakerphones on the base and the handset Backlit 3-line caller ID displays on base and handset Up to 14-day standby battery life