3 Handset Answering System with Caller ID/Call Waiting. Simulated full-duplex handset speakerphone. 22 minutes of digital recording time. 30 name and number caller ID history. Extra large display. Table and wall mountable. Backlit display and keypad. ECO mode power-conserving technology. Quiet mode. Call block. Expandable up to handsets (accessory handset EL50005). DECT 6.0. Call screening. Call intercept. Remote access. Message retrieval from handset. Message time stamp. Intercom between handsets. Conference between an outside line and up to cordless handsets. 50 name and number phonebook directory. Volume control. Voicemail waiting indicator. Last 10 number redial. Mute. Any key answer. Battery type: 2.4V 300mAh nickel metal-hydride. Color: Silver.