PANASONIC Expandable Cordless Phone System with Amber Backlit Display and Call Block &ndash; 1 Handsets &ndash; KX-TGC350B (Black) EASY-TO-READ CORDLESS PHONE DISPLAY - See who's calling at a glance on our wide, 1.6 inch Amber Backlit LCD screen on the phones base unit and cordless handset CALL BLOCK - Eliminate unwanted calls with Call Block capability. Register up to 30 numbers by entering Caller ID info into the phone's call block memory NTELLIGENT ECO MODE - Power-conserving technology manages consumption for optimal phone battery performance SILENT MODE CORDLESS HANDSETS - Silent mode allows you to select a period of time during which the cordless handset and/or telephone base unit will not ring for outside calls CALLER ID - This cordless phone system is Caller ID compatible. To use Caller ID features, you must subscribe to a Caller ID service. Contact your phone service provider for details